Suddenly, a violent gunshot rang out from underground, followed by screams, screams, and screams of despair.

After a while, the walls of a room on the first floor suddenly slid silently to both sides, and several people in chemical protective suits scrambled out of it, and the white chemical protective suits were stained with blood and scarlet.

Escaping from the wall were five men armed with automatic rifles, the hoods of their chemical protective suits had been torn off, and the five men seemed to be terrified, and as soon as they got out of the elevator, they rushed out of the room as if they were running for their lives.

"Al, Nord, Filly, hear the reply. A large man in a chemical protective suit shouted in a trembling voice from the communicator he was carrying in his ear.

This man has a terrifying scar on his face, and it is none other than Smith, the leader of the special operations team. There was no sound in the headphones, and there was no echo at all, and Smith's face was even more ugly.

"Captain, what now?" said one of Smith's men, blushing.

When there was no response from the three snipers on the roof, Smith and the others stopped in a secret spot on the first floor, carefully guarded.

"Something happened on the roof. Smith's face was cloudy, and the look of horror in his eyes had retreated, replaced by a strong desire to survive**. It is this kind of survival** that he Smith was able to escape from countless mortal situations.

"Al and Nord, they ......," a black soldier said in horror, a flash of despair in his eyes.

These five men were well-trained soldiers, and although they were unimaginably frightened at the entrance to the M23 area below, only five of the dozen people escaped, but they did not see these five people in disarray.

"Damn, those crazy guys told us to deal with these things, don't you want us to die?" said a soldier with a blank face.

"Bang, bang......!" There were several muffled crashes from the room Smith had escaped, as if someone was smashing the ground with a heavy object.

"The monsters are coming up. One soldier said in a trembling voice, a look of fear, panic, and despair on his face.

Hearing this sound, Smith and the other subordinates' faces suddenly changed, as if they had heard the most terrible sound in the world, and immediately reflexively aimed the automatic rifle in their hands in the direction from which the sound came.

Everyone's nerves tensed, and their expressions changed drastically.

"Don't panic, there's a helicopter on the roof and in the yard, and we can get out of here as soon as we get on the helicopter. Although Smith was also panicked, his mind was still clear, and he immediately had an idea.

"However, Al, Nord, and Filly have obviously had an accident, and there must be something going on in this building that we don't know about, so we must be careful and form a battle formation. ”

Smith felt bad, and had a vague sense that there was a great danger lurking in this building, and that they might well be planted here.

"Boom!", there was a loud bang, sawdust flew, and the door that had been closed by Smith and the others when they escaped was actually blasted from the inside, and in the dim light, a tall figure appeared behind the door.

Time was running out, and just as Smith and the others decided to use the helicopter in the yard to escape from here, heavy footsteps rang out, and it seemed that the ground was shaking with the sound.

"Let's go!" Smith and the others glanced at each other, then dispersed nimbly, and then carefully withdrew out of the courtyard through the bunker in the building.

In the courtyard, a pitch-black helicopter squatted on the lawn like a big bird, and the military researchers who came here in this helicopter had all died in front of the secret entrance to the M23 area.

Near this building in the east of the city, signs of the spread of the virus have been detected.

Military researchers, when they opened the secret entrance to the M23 area, released a horror that can only be seen in science fiction movies.

Smith's men, except for the four who escaped, were all killed by those monsters. The monsters were still hunting Smith and his four men who had escaped the kill.

The sound behind him was getting closer, and Smith and his four men retreated from different positions to the building in front of the courtyard. But they didn't dare to rush out of the courtyard, after all, there were still uncertain dangers in this building.

The three snipers on the roof of the building will not hang up for no reason and without any alarm.

But the sound of heavy footsteps behind him was getting closer, and Smith was sweating profusely, beads the size of soybeans rolling down his head. More than ten meters away in front of him was the helicopter, how he wanted to rush out of the building like this, board the helicopter, and then control the helicopter and fly out of this dead city.

No matter how much he wanted to escape from here, but he just didn't dare to rush out of the building first, he vaguely felt that something was watching everything in this building, and if he was not careful, his life could be confessed here.

The sound of heavy footsteps was getting closer and closer, and the muscles in Smith's whole body were tense because of the tension, like a tightened spring, and as long as there was any wind and grass, he would shoot as soon as possible.

Suddenly, a figure burst out of a corner of the building, and Smith recognized the figure by the dim light of the temporary lights that had been installed in the building.

It was his black subordinate, who, as if he could not bear the boundless terror, rushed out of hiding place and rushed towards the helicopter.

Smith's pupils constricted sharply as the black subordinate had already run under the helicopter and was about to reach for the helicopter door.

At this moment, the roar of machine guns suddenly sounded in the building, and the firelight flickered wildly in the building, and then the sound of bullet casings falling to the floor was heard, and countless bullets poured out of the building made eye-catching marks in the air, shooting towards the black people in the courtyard.

"Ahh

The bullet pierced the black soldier's body and hit the fuselage of the helicopter, sending countless sparks into it.

"Boom!", suddenly there was a loud bang, the flames soared into the sky, and the helicopter turned into a ball of flames and exploded. The wreckage of the plane was scattered in all directions.

"Idiot!" Smith cursed in his heart, and almost fainted, not to bemoan the death of one of his subordinates, but to pity the helicopter. He gritted his teeth and sneaked into the building.

The only hope of escaping here is the helicopter on the rooftop.

At this time, the heavy footsteps had come closer, the monster was approaching, and the other soldiers hiding in the building had nowhere to hide, and they were discovered one after another, and the noise in the building suddenly became loud.