Via the BBC: Iranian bombing ‘kills 11 people’:

Eleven people have been killed in a bomb blast near a bus in city of Zahedan in south-eastern Iran, the official Irna news agency has reported.

The bomb, hidden in a car, targeted members of Iran’s Revolutionary Guard, the agency said, although it is unclear if all the dead belonged to the guard.

Qassim Rezai, a military commander, described the act as “terrorism” and blamed “rebels” for the attack.

Reports say suspects behind the bombing have been arrested.

Correspondents say an attack of this size and nature is unprecedented in Iran - hitting an elite force in broad daylight in an open street.

[…]

Irna said five suspects were arrested, including two suspects apprehended by members of the public.

The city lies in the province of Sistan-Baluchestan, which borders both Afghanistan and Pakistan.

It has been hit by a string of attacks and kidnappings blamed on a hardline Sunni group called Jundallah (Allah’s Brigade).

Iranian officials have accused Britain and the United States of supporting ethnic minority rebels operating in the Islamic republic’s sensitive border areas.

The Reuters version of the story (Bus bombed in southeast Iran killing at least 11) points out that the area is one where drug smuggling takes place (which stands to reason, as it near the border with Afghanistan):

A booby-trapped car blew up a bus owned by the Revolutionary Guards on Wednesday, killing at least 11 people, in a border city in southeast Iran where security forces and drug smugglers often clash, state media reported.

[…]

The semi-official Fars News Agency said Jundollah (God’s soldiers), a shadowy Sunni Muslim group Iran has linked to al Qaeda, claimed responsibility. The group has been blamed for past kidnappings and killings in the area.

[…]

Iran has said Jundollah was behind the murder of 12 people in a roadside attack in May, and other incidents. Officials previously said Rigi was a cell leader of Osama bin Laden’s al Qaeda network in Iran.

The al Qaeda/Osama links are of interest, to be sure.