Duterte has denied responsibility for the extra-judicial killings. He has also frequently announced his support for them. According to Reuters, "Duterte's loud approval for hundreds of execution-style killings of drug users and criminals over nearly two decades helped propel him to the highest office of a crime-weary land."[10] In 2009 Duterte said: "If you are doing an illegal activity in my city, if you are a criminal or part of a syndicate that preys on the innocent people of the city, for as long as I am the mayor, you are a legitimate target of assassination."[47] In 2015, Duterte confirmed his links to extrajudicial killings in Davao, and warned that, if elected president, he may kill up to 100,000 criminals. After the said confirmation, Duterte challenged human rights officials to file a case against him if they could provide evidence to his links with vigilante groups.