At least 12 people were killed on Friday, when a Fokker 100 aircraft operated by Kazakhstan-based carrier Bek Air lost altitude after takeoff, broke through a concrete fence and collided with a nearby building. The captain of the aircraft was among the 12 dead, with 50 others, including six children, taken to a nearby hospital to be treated for injuries of varying severity. At least 17 of those 50 are currently listed in “extremely serious condition.”

The crash took place at 7:22 a.m. local time, as the Fokker 100 was departing for a routine flight from Almaty to the nation’s capital Nur-Sultan with an on-board compliment of 93 passengers and five crew members. One of the crash survivors told local press outlets that she heard a “terrifying sound” before the plane crashed.