Villagers in northern Kenya fear further violence after at least 29 police officers were killed over the weekend, an elder has told the BBC."The situation is very, very tense with heavily armed security personnel patrolling villages,” said the religious leader in Samburu County. The officers were ambushed as they attempted to recover stolen cattle.Internal Security Minister Katoo ole Metito vowed to bring those responsible to justice.He told the Standard newspaper the "disaster” was the worst in Kenya’s history.But the religious leader, who did not want to be named, said he feared that the security forces could take revenge on the local community."We fear the anger of these security people could fall on innocent civilians, as those who may have killed the policemen are nowhere now,” he said.He also said that more bodies still have to be found by officials.