A French national is believed to be among four men who stormed a Paris concert hall overnight, killing at least 82 people, police and a source close to the investigation said Saturday.

Investigators said found the body of a French national who was known to intelligence services and indicated he was likely one of four men who attacked the Bataclan concert hall late Friday as part of a series of simultaneous attacks on the French capital which killed 128.

They did not give details of his identity or his background.