Seventeen people died on Tuesday when a passenger bus careered off a road on a "killer curve" and plunged down a mountain in the central Philippines.

Seven people were in critical condition in hospital, and four others were stable, Train said, describing the section of road as "accident prone."

 Provincial disaster agency head Roderick Train said the bus was traveling in Hamtic municipality in Antique province when the crash happened.

One Kenyan national was among those killed, and a second Kenyan was among those critically injured.

Governor Rhodora Cadiao told radio station DZRH that four Kenyans were on board the bus that mainly carried Antique residents.

Local police later clarified there were only two. Another body was still being identified.

"I call that place 'killer curve'... it was already the second Ceres bus that fell off there," said Cadiao, referring to the bus company.

"With the many number of deaths that road must be abandoned... and make another road to make that area safe."

"Based on the witnesses, it was a mechanical failure. The driver lost control, possible brake failure," Train said.

Cadiao visited the hospital where survivors were being treated for their injuries. She promised government assistance for the medical and funeral expenses of victims.

Train said the search and rescue operation had finished and authorities would now focus on retrieving the bus.