The head of an American organisation focused on hostage releases said on Monday he believes U.S. journalist Austin Tice was still being held in Syria by people loyal to toppled leader Bashar al-Assad.

Saudi Arabia, France, and the US were viewed as possible players behind the scenes dealings that saw Salam selected among Lebanese parties as the next prime minister, sidestepping the Hezbollah-Amal bloc which expected Najib Mikati to be given the designation.

Lebanon's Prime Minister-designate Nawaf Salam said on Tuesday his hands were "extended to everyone", in a gesture to the Iran-backed Hezbollah militant group that accused opponents of seeking to exclude it by nominating him for the post.

Nawaf Salam, the head of the International Court of Justice, was named Monday as Lebanon's new Prime Minister after he won the support of 84 parliamentarians in another blow to the once powerful Hezbollah.

The ICJ president is not a Hezbollah favorite, but has secured the backing of more than 70 parliamentarians to be Lebanon's next prime minister.

Lebanon's Prime Minister-designate Nawaf Salam said on Tuesday his hands are extended to everyone, in a gesture to the Iran-backed Hezbollah group that accused opponents of seeking to exclude it by nominating him for the post.

Prime Minister Nawaf Salam on Tuesday said he was reaching out to all across the political spectrum to help "rescue, reform and rebuild" Lebanon.

Technocrat and international jurist Nawaf Salam won the job just days after Lebanon named a president for the first time in two years.

Nawaf Salam, who has been designated as the new Prime Minister of Lebanon, has resigned as a member of the International Court of Justice, said the ICJ on Tuesday.