Detainees climb on Sydney centre's roof

Three male detainees from a juvenile correctional centre in Sydney west have caused a commotion after climbing onto the centre's roof and refusing to come down.

Staff from Cobham Juvenile Justice Centre in St Mary's were forced to negotiate with the trio after they climbed onto the roof, in the early hours of Wednesday.

Police were called but were not required to intervene with the three detainees, who eventually returned to their rooms uninjured.

The three detainees and one other are being questioned by police.