Iran's Revolutionary Guards said on Sunday that one of its officers, Colonel Sayad Khodai, was killed in a rare assassination in Tehran, the semi-official Tasnim news agency reported.
Khodai was "one of the defenders of the shrine", it said, referring to military personnel or advisers that Iran says fight on its behalf to protect Shi'ite sites in Iraq or Syria.
Two people on a motorcycle opened fire on Khodai, Tasnim reported, citing an informed source.