

A massive manhunt is under way for a gunman who killed three people and wounded a dozen others at a Christmas market in Strasbourg. France raised its security threat to the highest alert level, strengthened border controls and asked people around Strasbourg to stay put as police searched for the suspect. German police also tightened border controls across the Rhine river, officials said. Police identified the suspect as Strasbourg-born Cherif Chekatt, 29, who was known to the intelligence services as a potential security risk

