Iran's investigation into a helicopter crash earlier this year that killed president Ebrahim Raisi has found that it was caused by bad weather and overloading, according to an official quoted by Iranian media.
The helicopter carrying Mr Raisi and his entourage came down on a fog-shrouded mountainside in the north of the country, killing the 63-year-old and seven others, triggering a snap election.
Fars news agency, citing a security source, said that Iranian security forces had "absolute certainty that what happened was an accident".
Iran's army similarly said in May that it had found no evidence of criminal activity in the crash that also killed Mr Raisi's foreign minister, Hossein Amir-Abdollahian.
"The case of the crash of Ayatollah Raisi's helicopter has been fully completed by the regulatory and security institutions," Fars reported.
"The security and intelligence agencies have completed their detailed investigations and there is absolute certainty that what happened was an accident," it added, quoting the source.
Fars gave the main causes of the 19 May crash as bad weather conditions and the helicopter's inability to ascend with extra passengers beyond security protocols.
The aircraft was carrying two more people than the recommended capacity when it crashed, the inquiry found.
It ruled out the possibility of "jamming and hacking of electronic systems", Fars said, also nothing that "no signs of chemical agents and harmful substances were found".
Mr Raisi was buried days after his death following a funeral procession attended by tens of thousands of Iranians in the capital Tehran.
