Two people were injured Saturday night as an argument on the platform of a Calgary LRT station erupted in gunfire, police say.

The shooting happened shortly after 8 p.m. on the Victoria Park/Stampede station platform, just outside the BMO Centre.

Police say the argument was between three people riding on the LRT. The trio exited the train at the Victoria/Stampede station, at which point one of them pulled a gun and shot the other two before fleeing the scene.

A passerby told Global News he heard approximately six shots.

Both victims were taken to Foothills Hospital, one in life-threatening condition but they have since been upgraded to stable condition.

Police say the alleged shooter was found in the downtown area and arrested without incident.