Fire crews are investigating after flames tore through a series of parked tractor trailers in south Edmonton early Sunday morning.

The fire started just before 6:30 a.m. at Hi-Way 9 Express, a trucking company near 60th Street and 66A Avenue.

It took 16 firefighters nearly 90 minutes to get the flames under control.

While no one was hurt, five trucks were destroyed by the fire.

The cause of the fire is still unknown.