TEL AVIV, February 17,2010 (WAFA)- The British government on Wednesday summoned Israel's Ambassador to explain the use of passports held by six British-born Israelis in the assassination of a Hamas official in Dubai, the Israeli daily Haaretz Reported.

Ron Prosor will meet British foreign office officials on Thursday morning. British Prime Minister Gordon Brown said on Wednesday he would launch a full investigation into the use of the forged passports by a hit squad that murdered Hamas commander Mahmoud al-Mabhouh last month.

'We are looking into this at this very moment, we have got to carry out a full investigation into this. The British passport is an important document that has got to be held with care,' Brown said in a radio interview.

Opposition politicians in Britain have demanded that the Israeli ambassador be summoned over the affair, but the Foreign Office said Wednesday it had 'not made any official representation to the Israeli ambassador about the case.'

Brown said the British government would seek to accumulate evidence about 'what actually happened' before making any official statements on the matter.