"The EU should use all its leverage to ensure Sombath's safe return," said a joint letter from Amnesty International, Christian Solidarity Worldwide, Federation Internationale des Ligues de droits de l'homme and Human Rights Watch.
The civil rights activist has not been seen since December 15, when he was detained at a police checkpoint in Vientiane, and CCTV footage captured images of him being forced into a truck and driven away.//DPA