A retired Philippine police officer has linked President Rodrigo Duterte and his men to nearly 200 killings allegedly carried out by the officer and other members of a so-called death squad.
Arturo Lascanas made the allegations about Mr Duterte, from when he was a mayor, at the start of a nationally televised Senate inquiry.
The president's spokesman, Ernesto Abella, described Mr Lascanas as a "polluted source and perjured witness" because he had denied in a 2016 Senate hearing that there was a Davao Death Squad, which has been linked to Mr Duterte.
Mr Abella called Mr Lascanas's testimony "fabricated and unacceptable".
Mr Lascanas said he personally heard Mr Duterte order killings in two instances while the other attacks were initiated by police officers supposedly on his orders.