NEW YORK, April 16 (Xinhua) -- Four people were killed and at least 20 more injured in a shooting on Saturday night in the small Alabama town of Dadeville, the United States, local TV stations reported on Sunday.

The shooting occurred at around 10:30 p.m. local time on Saturday (GMT 0330 on Sunday), TV station WRBL cited the Alabama Law Enforcement Agency release as saying.

Local reports said that the shooting occurred at a dance studio during what seemed to be a teenager's birthday party.

The cause of the shooting was unknown, as well as whether any suspects had been taken into custody.