PEKANBARU, Indonesia: Four men were shot and killed as they staged an attack on a police headquarters that left one officer dead and two wounded, Indonesian authorities said Wednesday, after a wave of deadly suicide bombings claimed by the Islamic State group.
The latest assault in Pekanbaru on the island of Sumatra saw a group ram a minivan into a gate at the station and then attack officers with samurai swords, according to the country's national police.
It was not clear if Wednesday's incident was linked to the earlier attacks which saw two families who knew each other and belonged to the same religious study group stage suicide bombings at churches and a police station in Surabaya, Indonesia's second biggest city.
The attacks have put Indonesia on edge as the world's biggest Muslim majority country starts the holy fasting month of Ramadan from Thursday.
This week's bloody violence is putting pressure on lawmakers to pass a stalled security law that would give police more power to take pre-emptive action against people suspected of planning terror attacks.
Indonesia -- which is set to host the Asian Games in just three months and an IMF-World Bank meeting in Bali in October -- has long struggled with Islamist militancy, including the 2002 Bali bombings that killed over 200 people -- mostly foreign tourists -- in the country's worst-ever terror attack.
On Wednesday, police said they shot dead four of the attackers at the Sumatra police station and later arrested another who had fled.
Indonesian media said one attacker may have had a bomb strapped to his body but police did not immediately confirm the reports.
No group has yet taken responsibility for Wednesday's attack.