DETECTIVES investigating a murder at a primary school have made two more arrests.

A 15-year-old was arrested this morning while officers brought in a 22-year-old yesterday, in connection with the murder of Shawn Callum, 26, at Stonebridge Primary School, in Brent.

Paul Minto, 21, of Repton Avenue, Harrow, has been charged with the killing and will appear at the Old Bailey in May.