The United Nations has asked the Kenyan Government to protect witnesses testifying in Owino Uhuru Lead case amid claims some have received death threats...The four have been subjected to threats following the first hearing against the plant on May 17. The experts said they are due to testify again - a situation that risks their lives. "Unknown people have visited their homes at night repeatedly banging on their doors," the lot said in a statement. They four said it is unacceptable no one has been arrested for repeatedly threatening, harassing, intimidating and assaulting the witnesses. UN has been consistent in agitating for their safety. In 2014, 2017 and last week asked the State to protect and promote the rights of the environmentalists. "The government should urgently launch a proper investigation and bring those who are responsible to justice," the experts said. Those claiming they are being hunted said they have recorded statements with police but "investigations appear slow and inadequate". "The defenders fear for their safety and life, and are seeking for help to be relocated," the UN statement added.