San Francisco Frontiers - Blasts at Indonesia school mosque injure more than 50

The explosions took place at a North Jakarta high school around 12:15 pm (0515 GMT), sparking panic among the students.

"It immediately turned chaotic at the school, everyone ran outside to the field," 16-year-old Muhammad Rizky Muzaffar told AFP.

"Many of the students were injured, and a lot of them were taken straight to the hospital," he said, adding that the blast took place just before Friday prayers started at the school mosque.

Around 54 people were injured, 33 of whom were "still receiving medical treatment", Jakarta police spokesman Budi Hermanto said.

National police chief Listyo Sigit Prabowo said the suspect was a student, who was injured and undergoing surgery.

"Regarding the motive, we are currently investigating various kinds of information," Listyo said at a news conference.

Lodewijk Freidrich Paulus, deputy coordinating minister of politics and security, urged the public to not rush to judgement.

"Don't jump to the conclusion that this is a terrorist act," Lodewijk was quoted as saying by the Antara state news agency, saying a probe was underway.

He said the explosions took place at the back of the mosque on the school campus and near its door.

Investigators including bomb squad technicians were processing the scene on the school campus, and an AFP journalist saw plastic evidence bags on prayer rugs.

Kinza Ghaisan Rayyan, a 17-year-old student, told AFP there was confusion over what happened.

"At first we thought it came from some electronic equipment, maybe the sound system...but it turned out the explosion came from under the prayer mat," he said at a Jakarta hospital.

Jakarta police chief Asep Edi Suheri said authorities had set up posts in two hospitals to assist relatives in finding their loved ones.

Ferdi Ibrahim, the brother of a student, said he "panicked right away" on learning about the blasts.

"Finally, I got a call from my sibling's teacher, they were already in the hospital's emergency room," the 30-year-old said.

J.Martinez--SFF