Authorities in Dubai say they have identified several "European passport holders" as suspects in the killing of a Hamas military commander last week.
Preliminary investigations indicated Mahmoud al-Mabhouh was murdered by "a professional criminal gang" which followed him there, police said.
The suspects are thought to have fled the United Arab Emirates.
Hamas claims Israel killed Mr Mabhouh, a founder of the Izzedine al-Qassam Brigades. Israel has not commented. Lina Sinjab reports.