Saudi father pleads for son's release ahead of execution

The father of a young man who is facing the death penalty in Saudi Arabia has told the BBC his son is innocent, and has called for continued international pressure to help save his life.

Ali Mohammed al-Nimr was arrested in 2012 while still at school after taking part in protest rallies which started the previous year.

David Cameron and Francois Hollande are among those internationally calling for the decision to be reversed.

Caroline Hawley reports.