Operation Kratos was a set of tactics developed by London's Metropolitan Police Service for dealing with suspected suicide bombers, most notably firing shots to the head without warning. The tactics were developed shortly after the 11 September 2001 attacks, based in part on consultation with Israeli and Sri Lankan law enforcement agencies on how to deal with suicide bombers. Little was revealed about these tactics until after the mistaken shooting of Jean Charles de Menezes on 22 July 2005, in the wake of the 7 July 2005 London bombings. The term is no longer used by the Metropolitan Police, although similar tactics remain in force.