The families of more than 1,700 people, most of them Kosovo Albanians still missing since the Kosovo War (1998-99), marked the International Day of the Disappeared on Sunday.
Together with volunteers in Pristina, the capital of Kosovo, they covered hundreds of chairs with question marks to signify that the whereabouts of many are still unknown.
Awareness-raising events are organised around the world on Aug 30 by families of the "disappeared".
The annual commemoration aims to draw attention to people who have been imprisoned without their friends or relatives knowing where or why. It is also to highlight the work of organisations that campaign against secret imprisonment and seek to support the disappeared and their families.
The International Committee of the Red Cross also runs a programme tracing people missing as a result of armed conflict or internal unrest.