A forensic examination found that the victim died of multiple injuries to his head and body. The body is expected to arrive in Gaza on Thursday. "Hamas has also aligned with Hezbollah terrorists and they are both involved in drug trafficking to support their activities", Diker said.
"It was a brutal attack. we want them to be taken to court and given the heaviest punishment", he said.
On Sunday, Defense Minister Avigdor Liberman had said Israel was asking the Egyptian government not to allow Batsh's body to be returned to his family in the Gaza Strip until Hamas returns to Israel the bodies of two IDF soldiers, as well as two mentally ill Israeli citizens.
On Saturday, Malaysian Deputy Prime Minister Ahmad Zahid Hamidi said the suspects were believed to be Europeans with links to a foreign intelligence agency.
The men were believed to have entered Malaysia in January but their nationalities were still not known, police said.
According to the local police chief, the suspects had fair complexions, and were either of Middle Eastern or European descent.
Malaysia has no diplomatic relations with Israel.
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"We have some difficulty in finding the culprits".
"We know of a country in the Middle East which will do anything to deny the potential of the Palestinian people".
The Mossad has been accused in the past of eliminating figures who supplied Palestinian and Lebanese terror groups with advanced technology, as well as of assassinating Iranian nuclear scientists.
The spy agency was accused of executing the murder of Hamas military commander Mahmoud al-Mabhouh in his hotel room in Dubai in 2010.
The incidents come against the backdrop of violent protests organized by Hamas at the Gaza border fence in which 40 Gazans have been killed by Israeli troops since March 30, according to the Gaza health ministry.
Israel says that Malaysia has become fertile training and recruitment grounds for Hamas and other Palestinian militant factions over recent years, with many recruited at the International Islamic University in Kuala Lumpur.
Al-Batsh traveled locally and overseas to speak on Palestinian issues and was due to fly to Turkey for a conference when he was killed, police said.