Doubts over IS Texas attack claim

Anti-terror experts have raised doubts about a claim by the Islamic State (IS) group that it was responsible for the attack on a Texas cartoon contest that featured images of the Prophet Mohammed.

The experts say IS has a history of asserting involvement in attacks in which it had no operational role – suggesting the two gunmen could have carried out their own lone wolf-style strike before being shot dead at the scene of Sunday’s shooting in the Dallas suburb of Garland.