Colleagues of BBC Gaza correspondent Alan Johnston around the world have observed a vigil to mark 100 days since he was kidnapped.
BBC offices went quiet at 1315 GMT - the time Alan Johnston was abducted on 12 March.
At the same time, Alan Johnston's family and friends let off 100 balloons in their village in Scotland.
A Palestinian group calling itself the Army of Islam says it is holding Mr Johnston.
Staff, including these television presenters for BBC News, held up posters of Alan Johnston during the silence.
Even those covering the Glastonbury music festival or racing at Ascot, such as commentator Clare Balding pictured here, took part in the vigil.
Weekly vigils have been held since Alan Johnston - the only Western journalist working in Gaza - was captured.
Posters of Mr Johnston have been placed on buildings and buses in London - and his image also projected onto Battersea power station.