Who made a run at the Iranian Quds Force Commander?

via Sputnik.

Iranian authorities have thwarted an assassination plot against Islamic Revolutionary Guards Corps Quds Force commander Soleimani, with three alleged plotters arrested, Iran's Fars News Agency has reported.

According to authorities, the attempt to assassinate the commander was a "regional," "joint Israel-Arab" plot, with no information provided yet regarding the identities and/or nationalities of those arrested.

According to Hossein Taeb, the head of the IRGC's Intelligence Organisation, the plot by a "group of terrorists" took several years to concoct, with the plotters planning to plant between 350 and 500 kg of explosives under a congregation hall at a religious event in Kerman, southeastern Iran, at which Soleimani was supposed to appear in September. The plotters were said to have been captured and arrested before being able to carry out the operation.

Story here. 

Interesting.

Too bad they missed.  Why would an operation of this type take several years to pull off?  Seems like the longer in duration the greater the chance of discovery.

I hope the Iranians tell us more of this so called "assassination attempt".  Until it's verified I'll consider this just propaganda to get Iranian public opinion on their side.