Four people arrested after Adelaide birthday party turns violent

Glass bottles have been hurled at police who arrived to break up a wild 21st party in Adelaide’s south.

The party, held at Christie Downs Community House on Morton Road, spilled out onto the street Friday night.

Three teenagers and a 23-year-old woman were arrested after the chaos woke locals and required more officers at the scene.

“It was just ballistic, it went on for hours,” local resident Peter Rogers told 9NEWS.

Broken glass littered the road the next morning.