At that position, the enemy's RPG cannot attack directly, and can also tightly block the cave leading to this hall from the outside.

Sure enough, just a few minutes after the retreat, several furtive figures appeared at the entrance of the cave hall. Kevin and the other four opened fire with their guns. Two of the five people who tried to enter the cave hall fell down immediately, and the other three immediately retreated.

Kevin made a gesture, and the four of them retreated immediately. Sure enough, just as they retreated to the next cave hall, there was a violent explosion. However, Kevin and his team had already retreated far away, so this RPG attack did not cause any impact on them.

As soon as the explosion ended, they immediately returned to their previous defensive position, staring at the cave entrance with guns in hand.

After doing this several times in a row, the people outside seemed to realize that such an attack was ineffective after leaving behind four corpses, but they obviously had no good solution.

At this moment, Yang Jing and Clark approached Kevin and the others.

Seeing that Kevin and the other four had blood all over their faces, Yang Jing was also shocked and asked quickly, "What's going on?"

Unfortunately, Kevin and the others couldn't hear Yang Jing's question clearly. The first explosion had already broken their eardrums. If they hadn't spoken loudly in their ears, they wouldn't have been able to hear what others were saying. However, this kind of traumatic rupture of the eardrum caused by the explosion can usually heal on its own after three or four weeks as long as it is well protected. If it can't heal, then you need to go to the hospital for eardrum repair surgery.

Although he couldn't hear clearly what Yang Jing asked, the injury to his eardrum did not affect Kevin's speech.

"BSS, there is a group of mercenaries outside, and we are not sure of their identities yet. I guess there is a traitor among us, so they can catch us so accurately. And according to Thor's analysis, the Blue Whale can't be contacted because it is electromagnetically suppressed. In other words, the enemy is now divided into two groups to deal with us, one group is on the Blue Whale, and the other group is here..."

Kevin quickly recounted in the shortest possible words what had just happened, during which he even fought off an enemy attack.

Kevin's words made Yang Jing and Clark angry. It was obvious that there was definitely a traitor among their group, otherwise the enemy would not have been able to accurately find them in an uninhabited area like Siberia. Although the situation on the Blue Whale was not clear yet, judging from the current situation here, the Blue Whale must not have had an easy time either.

Yang Jing was not worried about anything else, he was most worried about Gege. If something unexpected happened to Gege, he would really go crazy!

At this moment, a voice from outside came in after being amplified by the loudspeaker.

"Kevin Martin, my old friend, long time no see. I'm Kiryankov, do you remember me?"

Kevin certainly couldn't understand the voice, but Clark's face changed after hearing it.

"BSS, I think we are in big trouble this time." Clark did not hide anything and directly told everything he knew.

"This Kiryankov is the second-in-command of the Russian 'Bloody Bear Claw' mercenary group. His nickname is 'Wolf Fang'. He has always been following 'Butcher' Kowalski. The 'Bloody Bear Claw' mercenary group is active in the battlefields of the Middle East and surrounding Russia. There are about sixty people in the group. It is a very fierce mercenary group. If Kiryankov appears here, then the number one figure of the 'Bloody Bear Claw' mercenary group, 'Butcher', is very likely to appear on the Blue Whale. BSS, we must find a way to break out as soon as possible. The Blue Whale needs support. If Kowalski captures the Blue Whale, I can't imagine what he will do to Sofia and Chris."

When Yang Jing heard this, his heart sank. But before he could think of anything else, Kiriyenkov's voice rang out again.

"Kevin, my old buddy, although we have fought on the battlefield in Syria, I still admire you. So this time I want to advise you to surrender as soon as possible. I will guarantee your personal safety."

"Also, don't think I can't do anything to you just because you hide in there. I just don't want to destroy this place. If you continue to irritate me, don't blame me for completely blowing this place up! You should know that I have the ability to do that."

"I know this cave is where the treasure is hidden, so I don't want to take such extreme measures as to blow it down, because then we will have to dig again. But if you don't surrender, I will definitely not rule out using this method to deal with you. I know you didn't bring much supplies with you into the cave, so I just need to blow up the cave entrance and let you starve for ten days. You can imagine the consequences, right? So, you better put down your guns and surrender. I swear by my nickname 'Wolf Fang' that I promise not to hurt you. I am interested in the treasure inside! Do you understand? I will give you ten minutes to think about it!"