Militants are battling security forces in the Afghan capital after Kabul was rocked by a series of explosions, leaving at least six people injured.
An Interior Ministry spokesman said two police stations in Kabul were targeted by three suicide bombers on May 9.
Najib Danesh said attackers had entered buildings near both of the police stations and were engaged in gunfire with Afghan security forces.
At least six people were wounded, Health Ministry spokesman Wahidullah Majroh said, adding that the casualty toll was likely to rise once security forces were able to get a clearer picture of the attack.
No one has claimed responsibility for the attack.
The initial blast on May 9 hit a police station in western Kabul's Dasht-e Barchi district, at around midday, police spokesman Hashmat Stanekzai said.
Minutes later, two back-to-back explosions went off in Shar-e Naw, the city's main business district, near the office of a travel agency that processes visa applications for India.
Danesh said police were battling an unknown number of gunmen in both Dasht-e Barchi and Shar-e Naw.
In both places, gunmen attempted to enter official buildings, prompting clashes with the security forces.
The Taliban and an Islamic State (IS) affiliate have carried out a series of massive attacks in Kabul in recent months.
Twin suicide bombings in Kabul on April 30 claimed by IS militants killed at least 25 people, including nine journalists who had rushed to the scene of the first attack.
Among the dead were two RFE/RL journalists and a RFE/RL trainee.
With reporting by AP and dpa