One person was killed and five wounded in an attack on a Basij paramilitary base in the southeastern town of Nik Shahr, reported Iranian state television on Saturday.
“A (paramilitary) Basij base in Nik Shahr came under ... fire this morning and several from the Revolutionary Guards communications personnel who were wiring the base were hit,” Mohammad Hadi Marashi, provincial deputy governor for security affairs, told the state news agency IRNA.
Authorities did not provide details about the nature of the assault.
The semi-official news agency Tasnim said the Jaish al-Adl militant group has claimed responsibility for the attack.
The attack happened during the morning flag raising at the base, the semi-official Fars news agency reported.
Nik Shahr is located in Sistan-Baluchestan province.
On Tuesday, Jaish al-Adl claimed responsibility for two bombings last week that wounded three police officers in front of a police station in the city of Zahedan, capital of Sistan-Baluchestan.
In December, a suicide car bomber struck a police headquarters in the port city of Chabahar, killing at least two police and wounding 42 others.
Iran began on Friday ten days of state-sponsored celebrations marking the 1979 Revolution which deposed Shah Mohammad Reza Pahlavi.