Iran yesterday hanged three men in public accused of involvement in the bombing of a Shiite mosque that killed 25 people, an official said, branding them "terrorists" and "enemies of God."

Iran also summoned Pakistan's ambassador Mohammad Bakhsh Abbasi over the deadly attack after Sunni rebels reportedly claimed responsibility, the official IRNA news agency reported.

The executions were carried out near the mosque in southeastern Iran which was devastated by Thursday's bombing, said Hojatoeslam Ebrahim Hamidi, justice chief of Sistan-Baluchestan province.

At least 125 people were also wounded in the powerful blast caused by a suicide bomber at the Amir al-Momenin mosque in the Sistan-Baluchestan provincial capital Zahedan during evening prayers.

"The terrorists Haji Noti Zehi, Gholam Rasoul Shahi Zehi and Zabihollah Naroui were hanged at 3.30 p.m. near the Amir al-Momenin mosque in public," Hamidi told the official IRNA news agency.

"They confessed to illegally bringing explosives into Iran and giving them to the main person behind the bombing," he added.

"They were convicted of being 'mohareb' (enemies of God) and 'corrupt on the earth' and acting against national security," Hamidi said.

He said the trio had been arrested before Thursday's bombing but had confessed that they had provided the explosives for the mosque bombing. They were tried and they had court-appointed legal representation," he said.

The three men, he added, had also been charged with "direct involvement" in the bombing of a Revolutionary Guards bus in 2007 in which 13 people were killed, the bombing of Al-Ghadir mosque in Zahedan in February this year which caused no casualties and "some other bombings".

Iran summoned Abbasi after Iranian state television quoted pan-Arab channel Al-Arabiya as reporting that the Jundullah (Soldiers of God) group said it was behind the mosque attack. Jalal Sayah, the province's deputy governor said last Friday that the three men arrested over the incident were "hired by America and the agents of the arrogance".

State Department spokesman Ian Kelly denied emphatically that Washington was behind the attack, saying the US does "not sponsor any form of terrorism in Iran."

The chief of the Iranian armed forces, General Hassan Firouzabadi, in comments carried yesterday on the state television website, accused Britain and 'Zionists' of involvement in the bombing.

"We should not forget the role and the plot of the British who in the past 200 years tried to divide Sunnis and Shiites," the general said.

State-run television, meanwhile, showed footage of funeral ceremonies yesterday for those who died in the bombing.