Department of Justice staff are trying to coax three teenagers down from the roof of Banksia Hill Juvenile Detention Centre

Vision captured by the 7NEWS helicopter showed teens armed with bricks as they jumped across the roof of the facility on Friday afternoon.

It is unclear what time they scaled the facility, which is understood to have been damaged during the ordeal.

A spokesperson for the department said staff were “monitoring the situation”.

“There is no risk to the wider public,” they said.

Footage showed one teen kicking an air-conditioner unit on the roof and extensive damage to the exterior of the facility.

The maximum-security facility houses sentenced and unsentenced boys and girls in separate units. It is the only dedicated juvenile facility in WA for children between ages 10 and 17.

WATCH THE FOOTAGE IN THE PLAYER ABOVE