Mohammad Hamdan was wounded when a bomb placed in his car detonated in the southern port city of Sidon on January 14.

Hamdan did not appear to have a public or political role in Hamas, but according to a Palestinian security source, he was a member of the organisation's security structure.

The press office of Nouhad Mashnug, Lebanon's Interior Minister, said on Friday one of the perpetrators had been coordinating with Israel. Investigators were able to arrest "one of the main perpetrators of the crime, who confessed to being tasked by Israeli intelligence," said a statement released.

The statement did not specify the suspect's nationality, but said investigators seized "very advanced communications mechanisms from his home, and correspondence between him and his handlers."

Hamas also accused Israel of involvement in the attack against Hamdan.

In 2010, Lebanon sentenced a former security officer to death for collaborating with Israel to assassinate two Islamic Jihad leaders in Sidon.