Metro Manila (CNN Philippines) — Fifteen people were killed after a bus carrying college students crashed Monday into an electric post on a hilly descent in Tanay, Rizal, according to disaster management officials.

The victims — 14 of whom were college students on a field trip — were killed after the bus lost its brakes and crashed into the post at around 9 a.m., in Sitio Bayucan, Barangay Sampaloc, Municipal Disaster Risk Reduction and Management Office (MDRRMO) said. The bus driver was brought to a hospital but eventually died.

Engineer Carlos Inofre, head of the Tanay MDRRMO said the bus was carrying students from BestLink College of the Philippines in Novaliches, Quezon City.

The students were en route to Sacramento Adventure Camp in Tanay, Rizal, 50 kms east of Manila when the mishap took place.

The collision caused the post to collapse, fall on the bus, and crush its roof. The bus' engine also fell from the vehicle because of the impact.

Authorities have yet to release an official tally on how many students were injured. The Tanay Public Information Office estimates there were around 58 passengers on the bus.

Passengers injured in the crash were brought to the 2nd Infantry Division Army Station Hospital, Tanay General Hospital, and Rizal Provincial Hospital.

In a text message to CNN Philippines, Coach Bus Tours, which owns the bus unit, said they would shoulder the victims' medical and funeral expenses.

Those looking for more information may contact the Tanay PIO hotline at 942-7174 local 308.

CNN Philippines Correspondent Rex Remitio contributed to this report