Several top commanders in Iran's elite Revolutionary Guard have been killed in a suicide bombing in the volatile south-east of the country. Iranian state media say at least 20 people have died in the attack, in the province of Sistan-Baluchistan, and dozens more injured. The commanders were in the region for a meeting with tribal leaders. No group has claimed responsibility for the attack, which was condemned by Iran's Parliamentary Speaker. Iran has previously accused a Sunni resistance group, Jundallah, of terrorist activities in the province. Sistan-Baluchistan is mainly made up of the Baluchi ethnic group who are Sunni Muslims, some of whom oppose Shia rule. The deputy commander of the Guard's ground force, General Noor Ali Shooshtari, and the Guard's chief provincial commander, Rajab Ali Mohammadzadeh, were among the dead, Irna state news agency reported. Parliamentary speaker Ali Larijani, speaking at an open session of parliament which was broadcast live of state radio, said: "We express our condolences for their martyrdom. "The intention of the terrorists was definitely to disrupt security in Sistan-Baluchistan Province." Source: BBC