World Bulletin / News Desk
Police Inspector Robert de Guzman told reporters the incident took place in Capintalan village.
De Guzman quoted bystanders as saying they saw the speeding LeoMaric minibus, which was bound for Candon in Ilocos Sur province, falling into the ravine.
At least 40 passengers, including the dead and injured, were brought up to the side of the road, he said.
The injured were rushed to a hospital in Bambang in Nueva Vizcaya province.
According to preliminary investigation, De Guzman said, the bus driver was allegedly over speeding and even overtook vehicles before it fell into the ravine.
Carranglan Mayor Mary Abad told GMA News the highway where the incident took place was prone to accidents.