CHRONOLOGY-Major bomb attacks in Iran

(Reuters) - A booby-trapped car blew up a bus owned by the Revolutionary Guards on Wednesday, killing at least 11 people in the border city of Zahedan in southeast Iran, state media reported.

Iran also executed three men on Wednesday convicted of taking part in a series of deadly blasts in the city of Ahvaz in 2005, the semi-official Fars News Agency reported. The men were the last in a group of 10 to be executed.

Ahvaz is the capital of oil-rich Khuzestan province which has a large ethnic Arab population and where anti-government unrest has simmered since 2005.

Here is a chronology of some major bomb attacks in Iran:

August 30, 1981 - President Mohammed Ali Rajai and Prime Minister Mohammed Javad Bahonar are killed in a bomb blast at the prime minister's office in Tehran.

June 20, 1994 - A bomb rips through the main hall at the Imam Reza shrine in the northeastern city of Mashhad, killing 26.

June 2, 1998 - An explosion kills three people at an Islamic revolutionary court in Tehran.

September 16, 1999 - A bomb hidden in a garbage can near a Shi'ite Muslim shrine in Mashhad kills two.

June 12, 2005 - A string of bomb attacks in Ahvaz, close to the border with Iraq, and in Tehran kill nine people.

October 15 - Twin bomb blasts outside a shopping mall in Ahvaz kill six.

January 24, 2006 - Eight people are killed when bombs rip through a bank and government building in Ahvaz.

February 14, 2007 - A booby-trapped car blows up a bus owned by the Revolutionary Guards in Zahedan city in southeast Iran, on the border with Pakistan and Afghanistan. Eleven staff members of the Guards are killed and 31 injured.