Twenty villagers were killed when suspected Boko Haram fighters stormed a remote village in Nigeria's Borno state, shooting sporadically and razing houses, survivors said on Tuesday.Throats of some local residents were grisly slit by the attackers on Monday, said Habib Yakubu, a survivor of the incident at Debiro village located in Hawul district of the restive Borno state, Xinhua reported.He said women and children were killed in the attack, as the rampaging gunmen, who stormed the village in motorcycles and vans, shot indiscriminately at anyone in sight.Most of the villagers, who fled for safety, found refuge in the neighbouring Kworjafa village, located some 250 km to Maiduguri, capital of Borno state.