A bomb exploded at the Al Qadir Mosque in Zahidan an hour ago, the Fars news agency reported. No injuries have been reported.
A motorcyclist detonated a bomb in front of the mosque.
No group has assumed responsibility for the blast.
Zahidan is populated by Sunni Muslims.
The Jundallah terrorist organization has committed acts of terrorism against the government.
Jundallah assumed responsibility for a mine blast that killed four Iranian military personnel last week.
Jundallah demands that the government protect the rights of the Sunni Baloch people.
Iran considers Jundallah to be terrorist organization.