Although one of them had been shot, the person wasn't dead.
The three of them noticed that something wasn't right. Not only was the other party prepared, they even had guns. The one who was injured wanted to run, but before he could go anywhere, he met with another group of people.
These men had guns in their hands as well.
Plus, all of them started firing at them without any mercy.
The killers were aware that their mission had failed, and the result of it was not something that they could survive. However, they were foreign citizens of this country, and they were hoping that they could get away with it. Even if they were caught, the worst that could happen was being sent to the police where they would be interrogated.