Raisi helicopter crash caused by weather

Iran's investigation into the May helicopter crash that killed president Ebrahim Raisi has found it was caused by bad weather and overloading, Iranian media said Wednesday citing an official.

The helicopter carrying 63-year-old Raisi and his entourage came down on a fog-shrouded mountainside in northern Iran, killing the president and seven others, and triggering snap elections.

Fars news agency, quoting an informed security source with knowledge of the concolusions of the probe, said Iranian security forces had "absolute certainty that what happened was an accident".

"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.