Fire crews battling blaze in Ancaster

Fire crews are battling a blaze in Ancaster's industrial business park this morning.

Fire Prevention Officer John Verbeek tells CHML Morning News, the fire broke out in a manufacturing plant called Archmill House on Osprey Drive just before 3 o'clock.

At one point, crews had to be pulled out of the building because of a series of explosions.

Verbeek says they were caused by aerosol cans that went up in flames.

And he says that means they are fighting the fire from outside of the building.

Nobody has been hurt, but damage is extensive.

A portion of the building has now collapsed and hydro has been cut off in the neighbourhood.

The Ontario Fire Marshal has been called in to investigate the cause.