Students hurt in blast

MULTIPLE explosions shook a mosque at a high school during Friday prayers in Jakarta, Indonesia's capital, injuring at least 55 people, mostly students.

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Police officers and military personnel stand guard following the explosion

(Agoes Rudianto)

Police tried to dissuade speculation that the blasts were a terror attack and said they were investigating.

Witnesses told local television stations that they heard at least two loud blasts at around noon, from inside and outside the mosque, just as the sermon had started at the mosque at SMA 27, a state high school within a navy compound in Jakarta's northern Kelapa Gading neighbourhood.

Students and others ran out in panic as grey smoke filled the mosque. Most of the victims suffered minor to severe injuries from glass shards and burns.