Tehran: Four Iranian border guards were killed and five wounded by a grenade attack on their post at a city in the Kurdistan region that borders Iraq, state television reported late Saturday.
The report said the attack happened on Friday night in the city of Marivan. "Unidentified armed people threw a grenade into the police office," it said.
On March 25, news agencies reported two policemen were shot dead and three other people wounded in two "terrorist" shootings in the nearby city of Sanandaj.
Security forces in the west of Iran often clash with guerrillas from PJAK, an offshoot of the Kurdistan Workers Party (PKK), which took up arms in 1984 for an autonomous homeland in southeast Turkey and shelters in Iraq`s northeastern border provinces.
Like Iraq and Turkey, Iran has a large Kurdish minority, mainly living in the northwest and west.
Iran rejects allegations by Western rights groups that it discriminates against ethnic and religious minorities.