According to Iran, the black boxes of a Ukrainian plane that was shut down in January are unlikely to be useful in the examinations. The country's state media reported on the matter on Sunday.
Iranian Deputy Foreign Minister Mohsen Baharvand said the country is ready to hand over the boxes to a third country or a foreign company. According to the minister, the accident investigation is almost complete.
Canada has been demanding boxes for inspection for several months.
The plane was shot down in early January shortly after takeoff. More than 170 people died in the accident, most of them Iranians and Canadians.
Initially, Iran said the accident was due to a technical failure. It later said the plane was shot down accidentally.