A WA Police sergeant was left severely concussed after trying to break up a group of out-of-control teenagers in Madora Bay on Saturday evening.

Police were called to Madora Bay lookout on Eleanore Drive at around 7pm to respond to calls regarding a large number of youths congregating in the area.

The teens originally converged at Madora Bay lookout. Credit:Google Maps

Witnesses told police the teenagers were acting disorderly, smashing bottles and were seen with eskies and alcohol. Several police attended the scene, and dispersed the group.

However after 9pm, the remaining teenagers moved on to Catalina drive, and then to a house in Cohen Vista in Lakelands.