"The warning said there will be a concert in Indonesia and it will be international news," said police official.
Indonesian President Joko Widodo condemns Jakarta blasts and orders security forces to hunt down perpetrators.
He also urged public not to speculate over who may be behind Jakarta attacks.
Read More: Live: 4 suspected gunmen killed in Jakarta
Multiple explosions were reported from Jakarta on Thursday morning, with one blast being reported from near the UN office.