JAKARTA (Reuters) -Indonesian police found possible explosive powder as they investigated explosions at a mosque in the capital Jakarta, and the suspected perpetrator is recovering, the police chief said on Saturday.

Explosions that injured dozens of people during Friday prayers could have been an attack, officials said, with a 17-year-old student the suspected perpetrator.

“Several pieces of supporting evidence were found,” police chief Listyo Sigit Prabowo told a press conference after visiting the victims at a hospital.

“There were written materials and some powder that could have potentially caused an explosion,” he said. “We are gathering other records, including examining social media and family members to gather all the information.”

The suspected perpetrator, a student at a sch

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