A Texas medical student well-known in her community as an Iranian activist was mysteriously shot and killed in her car, just yards from her home.

Gelareh Bagherzadeh, 30, was driving through her Houston townhouse complex around midnight on Monday when she was shot dead through her car window.

"When officers arrived, they found a vehicle had run into a garage door at that location with the engine running and tires spinning on the pavement. Ms. Bagherzadeh was found slumped over in the driver's seat," the Houston Police Department said in a statement.