More than 45 foreign maids are facing execution on death row in Saudi Arabia amid growing international outrage at the treatment of migrant workers.

The startling figure emerged after Saudi Arabia beheaded a 24-year-old Sri Lankan domestic worker, Rizana Nafeek, last week in the face of desperate appeals for clemency from around the world.

The exact number of maids on death row is almost certainly higher, but Saudi authorities do not publish official figures. Indonesians are believed to account for the majority of those facing a death sentence. Human rights groups say 45 Indonesian women are on death row, and five have exhausted the legal process.