Fifteen new suspects — including six more 'Britons' — have been identified as suspects in the assassination of a top Hamas commander in Dubai, police say.

A total of 26 people have now been linked to the murder of Mahmoud al-Mabhouh, who was found dead in his luxury hotel room in January.

Dubai Police said that of the 15 new suspects, six had British identities, three Irish, two French and three Australian.

They had traveled to Dubai from six different European cities and Hong Kong, the statement said.

The group includes five women — one who used a British passport, three traveling on Irish passports and one with an Australian passport.

The announcement takes the number of suspects who used British passports to 12 from six, and those who used Irish passports to six, up from three.

The police force said in a statement: "The new list of suspects includes people who offered prior logistical support and preparations to facilitate the crime and others who played a central role.

"Dubai Police investigators are not ruling out the possibility of involvement of other people in the murder."

Mossad, Israel's secret service, has been widely blamed for the killing, with Dubai's chief of police among those pointing the finger.

In an indication that Mossad is still being blamed for the attack, the force said today: "The UAE (United Arab Emirates) will never tolerate the violation of its sovereignty or allow external forces to settle scores on its territory no matter what their ideology is."

In the days after the killing, Israel initially did not confirm or deny Mossad's involvement, but deputy foreign minister Danny Ayalon has since insisted that Israel had "nothing to do with what happened".

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