The Philippine presidential front-runner says he has no ill-gotten wealth after a senator alleged that he kept more than 200 million pesos ($4.2 million) in a bank account in 2014 that he failed to declare publicly as required by law.

Davao Mayor Rodrigo Duterte said in a news conference that he authorized his lawyer to go to the bank on Monday to explain to his accuser that he did not commit any wrongdoing. Sen. Antonio Trillanes IV said Friday he would go to the bank to meet Duterte's lawyer.

Duterte has led in voter preference polls ahead of the May 9 elections on a promise to rid the country of crime and corruption within six months if he wins.