A teenager has been remanded in custody in Turkey, charged with insulting the country's President on Facebook.

The 17 year old construction worker is the latest in a series of youngsters to have been hauled before the courts, as activists express growing alarm over the limits on freedom of expression under Erdogan.

It's understood he was arrested after someone called the police emergency line to complain about his Facebook posts.

No details have been released on the details of the post.