Zero flew into the mine tunnel, and at the same time stretched out his hand to take out an egg-sized special grenade from the carrying gear behind him.

This kind of grenade is called a sonar, it will not explode, and it does not have any lethality. But when the sonar is activated, it will emit ultrasound to scan the current environment. And through the standard tactical table of Doomhammer fighters, you can receive feedback from sonar to build an environment model to provide a clear terrain display.

Generally speaking, sonar mines are mainly used in environments with complex structures. For example, the mine tunnel in front of zero eyes.

After pressing Sonar Ray's start button, Zero threw the little thing out. The oval-shaped special grenade hit the ground. After the red signal light flashed three times in a row at the center, the sonar was split on all sides, forming a pocket-sized launcher. In the next moment, invisible sound waves were emitted from this little thing, propagating in the air at a speed of 340 meters per second, quickly passing through every space in the mine tunnel.

Zero opened the tactical watch on his wrist at the same time. The tactical watch received the feedback from the sonar, and the cyan lines quickly formed a mine tunnel mode extending in all directions on the black screen background. Suddenly, the complex topography of the mine road has made Ling remember by heart.

Behind him, intensive footsteps sounded. Zero no longer hesitated, and flew to the depths of the mine tunnel.

Although this abandoned mine has been transformed into a base by the wolf thief, with the economic and technological strength of the wolf thief, after all, it is impossible to carry out a deep transformation of the mine. In addition to repairing the power system for lighting, the wolf thief also built simple shanties around the mine, and repaired some mine tunnels in the peripheral area as temporary storage points for materials.

Therefore, the coverage of electricity only ends in these places. And zero deep into the mine tunnel, has been out of the scope of the wolf thief's transformation. Chasing zero into the mine tunnel, the team headed by Soldier Sander, after crossing the power-covered area, faced the black pressure, as if there was no end to the mine tunnel.

On weekdays, even the wolf thief seldom penetrates into these mine tunnels. Sander knows that these mine tunnels are intricate, and because of disrepair, the fixed frames of some mine tunnels have been loosened, and several landslides have been closed. Therefore, there are too many dangerous factors in the mine.

But Kazuo Bianto's order had to be carried out, so Sander made a gesture, and the members of the squad immediately dispersed, and everyone put on night vision goggles. In the infrared vision mode, they can see clearly even without lighting. It's not that the team didn't carry the lighting equipment, but if the lighting equipment was activated in a dark mine tunnel, it would be no different from a live target.

The mine was too quiet, only the sound of water droplets hitting the ground from a distance from time to time. Each member can almost only hear his own breathing and heartbeat, and the atmosphere is very depressing. But they are all soldiers who have been on the line of life and death for many years. Everyone has a strong psychological quality and does not cause any impact due to the suppression of the environment.

Sander is more like a patient cheetah in the dark. He cautiously allows the soldiers to advance in a V-shaped queue, so that even if the opponent attacks, it will give the soldiers a buffer time. Sander himself served as the leader of the queue. He walked in the front, half-catching his waist, landing silently.

At this moment, there was a messy sound in front of the team. It sounds like the sound of a metal can rolling on the ground, but judging from the huge reverberation in the mine tunnel, I am afraid that the weight of this "can" is not light. In the night vision mode, Sander quickly saw a group of dark shadows rolling in the distance. When this thing came about 30 meters away from them, this distance made Sander see that it was an iron bucket.

In the air, there was the smell of diesel. Sander's face changed, and he shouted, "Evasion, that's an oil drum!"

The voice fell, and the oil drum exploded. Suddenly, the mine tunnel brightened up. The soldiers in the night vision mode were immediately blinded by the intense fire light, and Sander rolled back from the ground, and at the same time, the automatic pistols sounded frequently.

Rages, screams, gunshots, and screams played a chaotic music. When the flames of the oil drum explosion gradually gathered, Sand took off the night vision goggles, but saw that three soldiers had been shot and killed. All three soldiers were shot at the center of their eyebrows, and they were all located in the same place, showing the enemy's superb shooting skills.

Sander cursed secretly and roared: "Take off the night vision goggles and put all the gun lights on me! Be careful yourself. Your opponent is a cunning mouse. Now, let's kill him!"

The soldiers responded. According to Sander, they took off the night vision goggles and installed gun lights on the machine guns. In this way, although the goal is obvious, it will not be caught off guard by the opponent using strong lighting.

After changing the equipment, the awkward members catted their waists and moved quickly behind the mine tunnels like abandoned mine carts and signs. After 10 minutes of marching in such a hurry, under the gun light, a figure flashed past and drilled into the branch to the left.

"Chasing!" Sunder shouted, got into the branch first, and immediately saw the figure flying forward. Without a word, Sander squeezed the trigger. The machine gun in his hand immediately spewed a half-meter tongue of flame, and the metal torrent of bullets swept toward the figure in front of him like a fiery whip.

Da da da--

The members who caught up afterwards, without the captain's order, fired with their guns.

But the speed of the figure was so fast, he ran on the ground from time to time, and then ran on the wall of the mine tunnel. The firepower of Sand and others always slowed him a step. Bullets are like bees that see honey, but no matter how hard the bees work, they cannot touch the sweet honey.

When the figure in front ran to the heart of the mine, the figure was slightly distorted, and another shadow was separated. Two figures swept from the left and the right to the mine tunnel in the opposite direction, and Sande's eyes were about to fall off.

"Damn, it's a supernatural person! I knew it wasn't that simple."

Sander immediately named four soldiers from the team, and he took the other three with him. The two teams tracked separately, and Sander got into the branch on the right. But before he ran far, he discovered that the mine tunnel had collapsed long ago, and there was no one in front of him. The obstacles in the cave-in were so tightly stitched that even rats could not climb over them, let alone people. Seeing this, Sander knew immediately that he was fooled.

"Quickly, quickly, let's go back!" Sand yelled, commanding the team to retreat.

But before they ran off the sidewalk ~lightnovelpub.net~ they saw fires flashing in the mine tunnel ahead, accompanied by gunshots and screams.

The sound of no more than 5 seconds before and after, gunshots, screams, and fires all disappeared at the same time. The mine tunnel in front became deadly silent immediately, Sander made a gesture to keep the team quiet and pressed the light to the ground. Maintaining this quiet way of marching, the four of them quietly pressed in the direction of the gunshots.

After walking about ten meters, Sand heard a strange time.

Didididi——

It's like the sound of electronic skipping stitches, and the frequency of the sound is getting faster and faster. Sand felt something was wrong, looked around, and found a device on the walls on both sides of the mine tunnel. It was a dark square box with a red signal light flashing in the center of the box. That didi didi sound was made by this signal light, and now, the frequency of the signal light flashing is almost crazy.

A drop of cold sweat fell on Sander's forehead, and the black man lost his voice: "No, it's a delay bomb..."

Before the words fell, a fire suddenly exploded in the black box. What Sander saw with his eyes was full of flames in all directions!