An "unidentified aircraft" has crashed into the sea off the coast of Myanmar, authorities have said.

The aircraft has not yet been located, according to Myanmar's Civil Aviation Department.

Department spokesman Tin Maung Ni said: "The only thing I can tell you for sure at the moment is that it is not an aircraft from our domestic airlines, so far as we've checked.

"None of ours have been reported any problems.

"We're still trying to find out more about the crashed aircraft."

Mr Ni added that aviation authorities were alerted to the crash by regional "sources".

He said there were no reports of incidents from any "companies operating offshore in the area and overflying" Myanmar.