Ten masked men slipped into a Swiss casino early Sunday armed with pistols and machine guns and made off with hundreds of thousands of Swiss francs. The robbers attempted to break into the casino’s vault, but failing that raided an unsecured cashier. Another group broke into the upper level of the Grand Casino Basel and cleaned out the cashiers there. About 600 surprised gamblers were in the casino at the time, and one guest was kicked in the head, while another woman outside, unaware of the robbery, was beaten when she inadvertently blocked the thieves’ getaway cars. The robbers spoke French and escaped to France, authorities said.