Two Philippine Senators said, President Rodrigo Duterte risks impeachment after he admitted personally killing criminals when he was the mayor of Davao City.<br/><br/>Senator Leila de Lima said, Mr Duterte has committed mass murders which is a high crime and according to constitution high crimes are a ground for impeachment. Senator Richard Gordon, who heads the senate justice committee, also said Mr Duterte opened himself to possible impeachment proceedings following his controversial comments. <br/><br/>Earlier on Monday, while speaking at the Business Forum in Manila, Mr Duterte had admitted killing criminals.<br/><br/>More than 2,000 people have been killed in police anti-drug operations since Duterte became president in July. Almost all were shot when they resisted arrest. Another 3,000 deaths are under investigation, with critics calling them vigilante killings.