Israel's Mossad has been accused of several high-profile killings involving Palestinians around the world, although Israel has consistently denied the accusations.
Four Arabs from the Gaza Strip were caught on the Israeli side of the southern Gaza-Israel border Tuesday afternoon, along the security fence. Inspector-General of Police Tan Sri Mohamad Fuzi Harun, said the photograph was obtained following the discovery of the high-powered motorcycle used by the two killers.
Malaysian police had earlier released computer-generated images of the two suspects, who witnesses described as well-built and light-skinned, possibly Middle Eastern or European.
Fadi Mohammad al-Batsh, 35, was killed in a hail of bullets by two attackers Saturday as he walked to a mosque for dawn prayers.
Hamas, an Islamist militant group that rules the Gaza Strip, accused Israel's Mossad spy agency of assassinating Batsh, who they say was a member of their group.More news: Saudi Arabia restricts drone operations following palace incident
He urged anyone who might have information to come forward, but acknowledged police were not sure if the gunmen were still in the country.
The suspects are believed to have entered Malaysia in late January but it is not known what their nationalities are or from where they had travelled, the police chief told reporters.
On Saturday, Malaysian Deputy Prime Minister Ahmad Zahid Hamidi said the suspects were believed to be Europeans with links to a foreign intelligence agency.
Mr Batsh's family has asked for his body to be buried in Gaza.More news: Comparing Games 1 and 2 with 3 and 4
Al-Batsh, an electrical engineering lecturer at a Malaysian university, was believed to have been working on Hamas' unmanned aerial vehicle program and was working on improving the accuracy of its rockets.
Israel's Defense Minister Avigdor Lieberman had appealed to Egypt to refuse the Palestinian request.
Malaysia, a Muslim-majority nation of 32 million people, has no formal diplomatic relations with Israel.
A string of Israeli officials would neither confirm nor deny whether Israel had a hand in his death.More news: Man Tasered, Removed From Flight in Miami After Allegedly Touching Passenger Inappropriately
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