Two blasts at a school mosque in the Indonesian capital Jakarta injured at least 50 people on Friday, authorities said, with a student accused of being responsible for the incident.

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 sa

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