Towards the end of Valerian and the City of a Thousand Planets we see Commander Arün Filitt's K-Tron robots split into two groups. One group is with the soldiers deep down in the space station, while the other group is standing just outside the command center.
At the crucial moment, based on orders from Commander Filitt, both groups of K-Tron start shooting up the humans. At both locations the soldiers seem incapable of defending themselves from the K-Tron.
It is only deep in the station at the Pearl's lair that the K-Tron are destroyed - by Valérian. Only his pistol has the fire power to destroy the K-Tron (which raises other questions - how come Valérian's pistol conveniently packs such a punch, and how come he shoots so well?)
But there doesn't seem to be an equivalent of Valérian at the command center, yet at some point in time the shooting by K-Tron stops.
So what happed to the group of K-Tron at the command center?