LONDON, March 24-- British leaders on Tuesday expressed their condolences to the families of the 150 people who are believed to have died on board the German low-cost airline flight when it crashed in southern France.

The Airbus A320 aircraft, operated by Lufthansa's budget airline Germanwings, crashed Tuesday in the French Alps while flying from Barcelona, Spain to Dusseldorf, Germany. There were 144 passengers and six crew members on board.

"Today's plane crash in the Alps is heartbreaking news. The UK will do everything it can to support the French emergency services," British Prime Minister David Cameron said via his Twitter account.

Deputy Prime Minister Nick Clegg also expressed his sympathy for the families of the victims.

"My heart goes out to people whose families and friends seem to have lost their lives in this devastating air crash in the Alps," he said.

British Foreign Secretary Philip Hammond said Britain would work with France, Germany and Spain in the aftermath of the airplane crash.

"Saddened to learn of plane crash in Alps today. Thoughts are with those affected. We're working closely with the French, the German and the Spanish," he tweeted.