Khar-Selim was deployed to assist and resupply the mothership, soon after it was deployed, they were attacked and destroyed by the Turanic Raiders which seemed to be under control of the Taidan fleet.
It seems that soon after Kharak made it's oficial space program, they were detected and tracked. It doesn't seems to be a mere coincidence. First they attacked Khar-Selim, and soon after, they bombed they planet and tried to destroy the cryo trays. So, were they under surveilance? And why?