Beirut: Two Hezbollah members have confessed to working for the US Central Intelligence Agency and a third is still under interrogation, the militant group's leader Hassan Nasrallah said on Saturday.

"When the Israeli enemy failed to infiltrate Hezbollah, it turned to the most powerful intelligence agency," Nasrallah said in a closed-circuit television speech broadcast in Lebanon, referring to the CIA.

"Our investigation has found that...intelligence officers (in the CIA) have recruited two of our members separately, whom we shall not name out of respect for the privacy of their families," he added.

Nasrallah also said the group was investigating whether a third member of the party had been recruited by the CIA, Israel's Mossad or the intelligence service of a European country.

The United States blacklists Hezbollah, arguably the most powerful armed force in the Arab world, as a terrorist organisation.

The Syrian- and Iranian-backed Shiite movement last fought a deadly war with its arch-enemy Israel in 2006.

(Agencies)