Suicide Attack On Iranian Revolutionary Guard Bus Leaves Over 20 Dead

Iranian state media reports a massive suicide bombing has ripped through an Iranian Revolutionary Guard (IRGC) transport bus in the country's southeast on Wednesday, leaving at least 20 dead and over 20 wounded. The death toll is likely to climb higher as more information is revealed. State-run FARS News Agency's live reports have identified up to 30 dead in the aftermath. 

A handout picture released by Iran's Fars news agency shows the bus that was reportedly blown up, via AFP/Fars News

The attack follows a similar incident last September, wherein ISIS claimed responsibility for a mass shooting at a military parade which left 29 dead. The last known suicide bombing inside Iran was in 2017, making Wednesday's bombing a rare and devastating event, especially considering it reportedly targeted elite IRGC personnel. 

According to early AP and Reuters reports, IRGC troops were aboard a bus when it exploded:

The suicide bomber struck a bus transporting IRGC members on the road between the cities of Zahedan and Khash in Sistan-Baluchistan Province, a volatile area near the border with Pakistan where militant groups and drug smugglers frequently operate, Fars reported.

No further details about the attack were immediately available.

FARS was quick to release footage from the blast site, which appears be along a remote desert highway, suggesting a high level of planning for the attack: 

Though it's not immediately clear who's behind the bombing, ISIS-linked groups have been behind prior attacks, including the June 7, 2017 attack on the parliament building in Tehran, as well as the important Shia religious site of the Mausoleum of Ruhollah Khomeini.

A total of 17 civilians were dead and 43 wounded as a result of the 2017 terrorist incident, which Iranian authorities blamed on both ISIS and Saudi Arabia. 

In an update on Wednesday, Iran's Press TV has identified a Pakinstani-linked Sunni group as claiming responsibility. The report also notes a suicide bomber detonated a car by ramming it into the bus: 

The IRGC's Qods Headquarters said in a statement that an explosive-laden car rammed into the bus, which was taking the personnel back to their homes.

The so-called Jaish ul-Adl terrorist group reportedly claimed responsibility for the bombing.

The terrorist outfit was formed in 2012 by members of the Pakistan-based Jundallah, another terror group dismantled by Iranian intelligence forces in 2010 after its ringleader Abdolmalek Rigi was executed.

Iranian border guards have repeatedly come under attacks by terror outfits active on the Pakistani soil.

The video posted by Fars showed blood and debris on the highway at the site of the attack, but few other details have been given. 

In the past Tehran's leadership has pointed to state sponsors behind such terror attacks, including Saudi Arabia and Pakistan.