Interpol has posted the names and pictures 11 people suspected of killing a Hamas commander in Dubai last month.
Dubai's police chief says he is 99% sure Israeli agents were involved in the death of Mahmoud al-Mabhouh, but Israel says there is no proof.
Mr Mabhouh was killed in his hotel room in Dubai on 20 January, a day after his arrival in Dubai. Reports have suggested he was there to buy weapons for Hamas.
Britain has expressed "outrage" that six British passports were used by the suspects.
Foreign secretary David Milliband says Britain expects Israel to cooperate fully with its inquiry into the fakes. He says Britain is determined to get to the bottom of how the fake passports were used.
Interpol said it believed the suspects had stolen the identities of real people and the names were used as aliases.
