Pierce Brosnan in under investigation by police in Los Angeles after allegedly beating up a man in Malibu, California. The former James Bond star is accused of attacking photographer Robert Rosen outside restaurant Casa Escobar on Friday (26Oct07). According to TMZ.com, Brosnan was dining with his son when he took offence to the paparazzo's presence. The Irish actor allegedly hissed, "Why don't you f**k off, mate," and then struck Rosen in the ribs. A witness says the snapper reacted by kicking Pierce in the stomach. Sheriff's spokesperson Steve Whitmore says his department is "actively investigating" the matter.