Every once in a while, crowded train stations have been known to break into song and dance and then disperse as if nothing happened. Large groups of people freeze for a period of time and then ...

A 7-Eleven in San Pedro was robbed and ransacked by a large crowd overnight, authorities said, the latest in a string of flash-mob robberies that led a city councilman on Saturday to call for ...

The Federal Bureau of Investigation headquarters are pictured in February in Washington, D.C. On Wednesday, the FBI's uniform crime reporting unit released its "flash mob shoplifting incident" report ...