Report: Gunmen attack Shiite holy site in Iran, killing 15

Iranian state-run media is reporting that gunmen opened fire at a major Shiite holy site in the southern city of Shiraz, killing at least 15 people.
The official website of the judiciary says two gunmen were arrested and a third is on the run.
The state-run IRNA news agency reported the casualty toll.
Sunni extrems have targeted holy sites sacred to the country’s Shiite majority in the past.
The attack comes as Iran has been convulsed anti-government demonstrations for over a month.