About 10 masked gunmen stormed a Swiss casino on Sunday and stole hundreds of thousands of francs, Swiss authorities said.
The French-speaking robbers armed with sub-machineguns and pistols fired several shots in the robbery at the Grand Casino in Basel but no one was hit, the Basel public prosecutor's office said in a statement.
However several gamblers and a security guard were slightly injured by kicks and blows.
The attack took place at about 4 a.m. (0200 GMT) at the casino close to Basel airport and the French border. The gunmen, dressed in black and wearing crash helmets, drove up in two French-registered cars.
They smashed their way in with a hammer and robbed cash desks on two floors while gamblers and staff threw themselves to the floor. As they left, they dragged a woman from a car blocking their getaway.
Swiss and French police were co-operating in the hunt for the gang, the statement said.