Explosions at a school campus in Indonesia's capital Jakarta have injured dozens of people.

Police said 55 people were in hospitals with injuries, including burns, after the blasts at the mosque inside a school complex in the Kelapa Gading area.

The suspect is a 17-year-old student.

Luciana, 43, who was working at the school canteen at the time described multiple blasts, broken windows and panic as dozens fled the complex.

"Our hearts were beating fast, we couldn't breathe, and we ran outside,"

she said.

"I thought it was an electrical wiring problem, or the sound system exploded, but we didn't know exactly what it was because we ran out just as a white smoke billowed from the mosque."

Deputy house speaker Sufmi Dasco Ahmad, speaking to media after visiting a hospital, said the youn

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