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Photographer Paul Conroy: Diplomacy in Syria has failed

17 March 2012 Last updated at 17:28 GMT

A photographer who was injured during a shell attack on the Syrian town of Homs has criticised the international community's response to the unrest in the country.

Paul Conroy was injured in an attack on a media centre by government forces in which two journalists were killed, including Sunday Times journalist Marie Colvin.

Speaking at a protest rally in London, he told the BBC's Sangita Myska he wanted to see "unilateral action... from anyone who will prevent the deaths of these people."