A FIERCE blaze which trapped a couple in their first-floor flat early this morning is being treated as arson.

Firefighters had to break into the property, in Mornington Street, Keighley, to rescue the occupants.

The man and woman, both aged 45-50, were taken to hospital suffering from the effects of smoke inhalation.

Fire crews from Keighley, Bingley and Silsden were called out to the incident, at 2am.

Four breathing apparatus sets were worn and two hose reels used to tackle the blaze, which started in the entrance area of the flat.

A special high-pressure fan was also brought in to help clear smoke from the premises.

The fire was brought under control within about ten minutes, but damage was extensive.

Watch commander Ahsan Ali, of Keighley Fire Station, said: "The flat was well alight when we arrived at the scene.

"We had to break the door down to gain entry and helped the occupants out.

"There was a lot of damage to that flat and the one below, which was unoccupied."

Police are investigating the incident, which is being treated as suspicious.