This can be done in mission 2, "Edge of the World". Toward the end of the mission you will make it to Addemire Station, where there are several enemies. Make sure to have an explosive, like a grenade on you. If you need a grenade, there are some located in the armory of the station. Now, get everyones attention and lead them into a small room and use your grenade to kill them.
Here is a video guide with English commentary!
Here is a playlist of guides for this game!
https://www.youtube.com/playlist?list=PL-HeW6XkKdUK8mXBAnaqv...