Indonesian authorities are investigating an explosion at a mosque inside a school complex in Jakarta that injured more than 50 people during Friday prayers, with police identifying a 17-year-old student as the suspected perpetrator. BBC News reported that the blast happened around 12:15 local time inside the state-run high school compound in Kelapa Gading, in the north of the capital.

The injuries ranged from minor to severe burns, and authorities said the suspect was also hurt and taken for surgery. The police chief, Listyo Sigit Prabowo, said an investigation was underway into how the suspect assembled and carried out the attack. The scene was secured by a bomb disposal team, which was sent to make sure there were no additional explosive devices.

The report also points to confusion over what was found at the site. A high-ranking Jakarta police officer confirmed that objects resembling firearms were present, while a minister who later visited the scene said one pictured object turned out to be a toy gun rather than a real weapon. Another item found was described as a dark green cartridge belt. That uncertainty matters because it shows how quickly the story moved from a local emergency response into a broader question about whether the blast formed part of a planned attack or something more improvised.

BBC's account also says pupils described the suspect as a loner who had made violent drawings and had allegedly been bullied. Those accounts are not police findings, but they give some of the context circulating among students and in local media after the blast. The broadcaster also reported that one pupil told the state news agency Antara a homemade bomb had been brought in by a student.

The incident has shaken a site that was supposed to be a place of routine worship. The mosque sits inside a school complex and was crowded for Friday prayers when the explosions hit. Witnesses described smoke, broken windows and panic as people tried to get out. One school cook quoted by Reuters through BBC said the blast was massive and left people struggling to breathe.

What can be verified from the supplied evidence is limited but clear: dozens were injured, the suspect is a teenager, and police are still trying to determine how the explosion happened and whether any wider motive or network was involved. That leaves room for the investigation to change the public picture, but not the basic facts of the day. A school mosque in Jakarta was hit in the middle of prayers, and the aftermath has already become one of the country's most disturbing local security incidents of the year.