Boko Haram gunmen dressed in military uniform on Sunday killed 19 people near the Nigerian border with Cameroon in the restive northeast where the Islamists have carried out deadly attacks, residents and a survivor said. The motorcycle-riding gunmen armed with Kalashnikovs blocked the highway near the town of Logumani, 30 kilometres from the border around 5:00 am, shooting and hacking to death 19 motorists and burning three trucks, they said.