Three police officers shot dead in Louisiana, three more wounded

Three police officers have been shot dead in Baton Rouge, Louisiana and three other officers were wounded (one is fighting for his life). The gunman, named as Gavin Long, has been shot and killed. Police were initially looking for further suspects, but later said they believed Long was acting as a lone gunman. The Baton Rouge Police Department has been on high alert since the police shooting of Alton Sterling prompted protests in the city