Haaretz has learned the identities of two Palestinians arrested in Jordan in connection with the assassination of Hamas commander Mahmoud al-Mabhouh in Dubai.
Ahmad Hasnin, a Palestinian intelligence operative, and Anwar Shekhaiber, an employee of the Palestinian Authority in Ramallah, were arrested in the Jordanian capital Amman.
Jordan on Tuesday confirmed it had extradited the two to Dubai.
The two were residents of the Gaza Strip until Hamas seized control there in 2007, a Hamas source told Haaretz.
Both moved to Dubai, where they were employed by a real estate company belonging to a senior official of Fatah, the political faction headed by Palestinian President Mahmoud Abbas.
A third man, a Hamas security operative, is under arrest in Syria on suspicion of having assisted the hit squad, the British daily The Guardian reported late Wednesday.
Palestinian sources in the Gulf said Nahro Massoud was in detention and under interrogation in Damascus, the Guardian reported.
Hamas politburo chief Khaled Meshal has denied the allegation, according to the report, saying "It is not correct at all".
But Palestinian sources insisted Massoud was being questioned amid speculation that potentially senior Palestinian defectors may have been involved in the plot.

Dubai to hand retina scans to Interpol'

Dubai police said Wednesday investigators had successfully recreated a detailed picture of the operation. The official Web site of the Dubai police featured the suspects' pictures and personal information in an effort to locate the assailants.
According to Palestinian news agency Ma'an, Dubai police said Wednesday that they hold retinal scans of the suspected assassins, which they plan to publish through international police intelligence service Interpol.
Airport officials carried out routine retinal scans on 11 suspects sought by Dubai when they entered the country in the days before the hit. An unnamed Dubai official said on Thursday that the investigation has now widened, with police seeking a further seven members of the assassination team - making 18 in all.
Dubai police also identified Austria as the "command center" for the assassins, after mobile phone data showed at least seven numbers originating there, the Guardian reported.
Dubai police speculated members of the group communicated using "encrypted" messages, and that contact was maintained via several Austrian mobile phone Sim cards.
Austria has confirmed its officials are investigating the claims.