LONDON -- Scottish officials said Sunday there may be more fatalities from the deadly helicopter crash in Glasgow. Eight deaths have been confirmed so far.

Scotland's First Minister Alex Salmond told the BBC on Sunday that of the 12 people still hospitalized, three are in intensive care but they are in stable condition.

The helicopter crashed into The Clutha club in Glasgow on Friday during a concert.

Emergency officials are still searching the crash site for bodies while working to remove the aircraft's wreckage.

"This is a painstaking process which we expect to take some time," said Deputy Chief Constable Rose Fitzpatrick. "Until we remove the helicopter we cannot be sure what we will find."

Investigators also are looking into what could have caused the helicopter to go down.

Officials said Sunday the aircraft was on a police operation and returning to Glasgow when it crashed, but declined to provide more details.