Mr Mabhouh died in his hotel room in Dubai last month
Israeli opposition leader Tzipi Livni has applauded the controversial killing of a Hamas commander in a Dubai hotel by suspected Israeli agents.
"The fact that a terrorist was killed, and it doesn't matter if it was in Dubai or Gaza, is good news to those fighting terrorism," she said.
It is thought to be the first time a top Israeli has made such a comment.
Mahmoud al-Mabhouh was found dead in his room on 20 January, having been electrocuted and suffocated.
His alleged killers used fake British, Irish, German and French passports, according to the authorities in Dubai, which released pictures of the suspects, none of whom were caught.
Mr Mabhouh was one of the founders of Hamas's military wing.
The Israeli secret service Mossad has been widely accused of carrying out the killing but Israel has repeatedly asserted there is no proof its agents were involved.
Mrs Livni, the former foreign minister who leads the parliamentary opposition for the Kadima party, did not indicate who was behind the killing.
"The entire world must support those fighting terrorism," she told a Jewish conference in Jerusalem.
"Any comparison between terrorism and those fighting it is immoral."
The current Israeli Foreign Minister, Avigdor Lieberman, responded to allegations of a Mossad plot last week by saying: "Israel never responds, never confirms and never denies."
Dubai security cameras picked up 18 members of what local police believe was a hit team.
Diplomatic tension between Western states and Israel has grown over the killing.