CHRIS THOMSON

5.15PM: A suspiciously-lit fire that shut down a kilometre of Stirling Highway at Mosman Park during the afternoon traffic peak is now under control and the highway reopened.

With the peak in full swing, firefighters had closed Stirling Highway in both directions between Vlamingh Parade and Victoria Street.

The Fire and Emergency Services Authority has now given the ‘all-clear’ as the blaze – near the corner of the highway and Boundary Road – is now under control.

Choppers fill up at Gil Fraser Reserve, North Fremantle.

Firefighters are mopping up and FESA is urging locals to remain alert.

Motorists have been asked to drive carefully due to smoke and emergency services personnel in the area.

Twenty firefighters and two helicopters attended the blaze that was reported at 3.06pm today.

FESA estimates 10 hectares were burnt out and that the cause of the fire was suspicious.

Anyone who saw dodgy activity around the scene of the blaze should call Crime Stoppers on 1800 333 000.

Smoke photo courtesy Paul Pichugun Fine Art Photography.

Helicopter photo courtesy Aleksandr Kharkovsky.