U.S. permanent resident and Lebanese businessman Nizar Zakka, who was imprisoned for four years in Iran before being released on Tuesday, has detailed his detention ordeal in several interviews with Lebanese TV networks.

“Even in movies, no one has witnessed the torture I was subjected to,” Zakka said in an interview with LBCI television, describing the Evin prison in Tehran as “the ugliest place in the world.”

Prime Minister Saad Hariri on Tuesday criticized several parties over the political tensions that the country witnessed during his vacation abroad but noted that he is still keen on the political settlement with the other camp.

“One cannot remain silent over mistakes or over any unacceptable remarks that breach the red lines and norms and the country can't be run through gaffes,” Hariri said in an apparent reference to Free Patriotic Movement chief and Foreign Minister Jebran Bassil.

Kataeb party chief Sami Gemayel on Tuesday lamented how Lebanese citizens living in Lebanon and abroad are paying the price of “absurd political arguments and irresponsible positions made by some figures of the ruling authority.”

A U.S. permanent resident and Lebanese businessman who was imprisoned for years in Iran arrived Tuesday afternoon in his native Lebanon after being freed by Tehran.

Nizar Zakka, held in Iran since 2015, arrived on a private plane accompanied by the chief of Lebanon's General Security Directorate, Maj. Gen. Abbas Ibrahim.

Foreign Minister Jebran Bassil traveled on Tuesday on an official visit to London where he is scheduled to meet with his British counterpart and several UK ministers, media reports said.

General Security chief Maj. Gen. Abbas Ibrahim emphasized that the Directorate has launched efforts to release Lebanese detainee Nizar Zakka in Tehran the moment he was detained, al-Joumhouria daily reported on Tuesday.

Radicals linked to the Iran-backed Hizbullah movement were found to be stockpiling bomb-making ingredients in London in 2015 in a case that was kept "hidden from the public", the Daily Telegraph reported on Monday.

State Minister for Presidency Affairs Salim Jreissati on Monday met with Grand Mufti Sheikh Abdul Latif Daryan, after which he announced that President Michel Aoun is keen on Prime Minister Saad Hariri's constitutional powers.

“President Aoun is keen on jurisdiction, especially that of the premiership,” Jreissati said after the meeting, noting that “the strong in their (confessional) communities are now at the head of the authorities.”

General Security chief Maj. Gen. Abbas Ibrahim on Monday met with Lebanese detainee Nizar Zakka in Tehran and the latter will be freed and repatriated to Lebanon on Tuesday, General Security said.

The security agency also posted pictures of the Ibrahim-Zakka meeting on its Twitter account.

Free Patriotic Movement chief and Foreign Minister Jebran Bassil on Monday defended recent remarks he has voiced about foreign workers.

“Our remarks are being distorted everyday and it is our duty to achieve Lebanon’s remarks and to correct any distortion,” Bassil said.