U.S. President Barack Obama telephoned Philippine President-elect Rodrigo Duterte on Tuesday to congratulate him on his election win, saying the high voter turnout reflects Manila's "vibrant democracy."

"The President highlighted the enduring values that underpin our thriving alliance . . . including our shared commitments to democracy, human rights, rule of law, and inclusive economic growth," a White House statement said.

Obama was the first foreign head of state to phone, Duterte told a reporter who was recording a TV interview with him when the call came through.