Iran executed in public three men convicted of involvement in Thursday's deadly mosque bombing in the southeast of the country, the official IRNA news agency reported on Saturday. "Three people convicted of being involved in the recent terrorist bombing in Zahedan were hanged in public on Saturday morning," IRNA said, adding that the execution took place near the mosque where the bombing took place. A provincial official said on Friday that the people behind the bombing were hired by the United States, an accusation Washington rejected. "It has been confirmed that those behind the terrorist act in Zahedan were hired by America...," Jalal Sayyah, a senior official at the governor's office in Sistan-Baluchestan province, told the Fars news agency. The explosion at a prominent Shi'ite Muslim mosque in the southeast Iranian city of Zahedan on Thursday killed at least 20 people, a senior official said on Friday.