At least 26 people have been confirmed killed in violence that broke out early this week in central Nigeria's Benue State, local authorities said on Wednesday.Three districts have so far been affected by the attacks suspected to be perpetrated by local herdsmen, said Michael Oguwche, a traditional chief in Anyii, one of the three affected villages. According to the local chief, the gunmen had first attacked Vase village on Monday, before moving to the two other villages to wreak havoc late Tuesday and early Wednesday.He said the sequence of the attacks on Vase village, Uzzar village and his village showed that they were coordinated.More than 30 people sustained injuries in the attacks, he added.Local police have confirmed the attacks, saying riot policemen were deployed to bring the situation under control.