Dubai’s police chief said Monday that an 11-person team of trained killers with European passports carried out the mysterious assassination of a senior Hamas official last month in a Dubai hotel. The chief, Lt. Gen. Dahi Khalfan al-Tamim, provided names and photographs of the suspects, along with a detailed account of how they tracked the Hamas official, Mahmoud al-Mabhouh, and suffocated him within minutes of his arrival on Jan. 19 at Al Bustan Rotana hotel, near the international airport. The suspects, who disguised themselves with wigs and fake beards, left Dubai immediately after the killing on separate airlines, the chief said. He also said that two Palestinian suspects in the case were arrested in Jordan and extradited to Dubai, where they are now in custody. Mr. Mabhouh played a role in the kidnapping and killing of two Israeli soldiers in 1989. Hamas has accused Israel of his killing, and has vowed to retaliate.