Crucially, he was a mid-range to possibly top commander of the IRGC's hardline domestic wing, the Basij militia, and a close ally of recently assassinated Quds Force chief Qassem Soleimani, reports state news IRNA on Wednesday. 

The details clearly suggest that it was an assassination — at this point by an unknown entity or group — given two men riding a motorcycle drove by and essentially executed him in the street. 

Reuters has described the slain Basij militia commander, Abdolhossein Mojaddami, as "an ally of Qassem Soleimani" — who was himself assassinated by US drone strike on January 3rd.