Story highlights Three police officers have been killed

ISIS has previously attacked Indonesia, the world's most populous Muslim country

Jakarta, Indonesia (CNN) A pair of suicide bombers struck a bus station Wednesday in the Indonesian capital of Jakarta, police said.

At least three officers were killed, national police spokesman Setyo Wasisto told reporters. Six other officers and five civilians were wounded.

Aluminium, nails, buckshot and receipts for purchasing rice cookers were found at the scene of the bombing, Inspector General Setyo Wasisto told reporters Thursday afternoon.

It's not clear who carried out the attack but Indonesian police spokesman senior commissioner Martinus Sitompul said authorities suspect ISIS involvement, according to CNN-affiliate CNN Indonesia.

In the past, ISIS has claimed responsibility for terror attacks in the Southeast Asian nation.

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