The explosion happened tonight at the Ekayana Grha Buddhist temple in West Jakarta, chief of National Police Detective Lt Gen Sutarman told reporters.
The bombs were apparently placed outside the building, and the blast caused minimal damage. Police were investigating and continuing to sweep the area, said Sutarman, who uses only one name like many Indonesians.
Militants in Indonesia angered over sectarian violence between Buddhists and Muslims in Myanmar have threatened to attack Buddhist temples here. In May, two men were arrested with low explosives in a backpack as part of an alleged plot to bomb the Myanmar Embassy in Jakarta.
Indonesia is the world's most populous Muslim nation.