A tragic accident unfolded Thursday on the Mississippi River near West Alton, Missouri, when a helicopter crashed directly into a barge.

Video footage captured the moment the aircraft collided with the vessel, igniting a fire and sending thick smoke into the air. The crash occurred along the river stretch that divides Illinois and Missouri.

Authorities have confirmed at least two fatalities, though the cause of the crash remains under investigation. Emergency crews from both states responded quickly, battling the blaze and searching for additional victims.

The names of those on board have not yet been released pending notification of family members. Federal investigators are expected to arrive on scene to determine what led to the fatal incident.