The Foreign Office is investigating reports that a British aid worker has been killed in Gaza.
Initial reports suggest a man called Kadir Islam, from Rochdale in Greater Manchester, is believed to have died on Sunday in an Israeli air strike while reportedly delivering hospital supplies in the southern city of Rafah.
A spokesman for the Foreign Office said it was aware of the reports and "looking into them urgently" but could not confirm further details.
It is not yet clear which aid organisation, if any, Islam was working for when he was killed. Third Sector contacted Muslim Aid, Islamic Relief and Interpal, but all said that Islam did not work for them.
A source from an aid charity said one theory was that Islam was not directly employed by any charity and had travelled to Gaza and volunteered with a local or international aid organisation when he arrived there.
The Prime Minister, David Cameron, commented on the reports last night during a First World War commemorative visit to the Loos Memorial in northern France. He said: "I'm extremely concerned about these reports and we are doing everything we can to get to the bottom [of them] and find out exactly what has happened. I don't want to say anything before we've been able to do that but this only reinforces the need for an immediate unconditional humanitarian ceasefire observed properly by both sides. This slaughter, this killing has got to end."