U.S. officials believe Hizbullah is smuggling advanced guided-missile systems into Lebanon from Syria piece by piece, the Wall Street Journal reported.

Some components of a powerful anti-ship missile system have already been moved to Lebanon within the past year, including supersonic Yakhont rockets, according to previously undisclosed intelligence.

The United States has condemned the terrorist bombing that targeted Beirut's southern suburbs, reiterating its call for the implementation of Lebanon’s policy of dissociation and urging all parties to refrain from retaliation.

A statement issued by State Department deputy spokeswoman Marie Harf on Thursday, said the U.S. condemned “in the strongest terms” the “terrorist bombing in the Haret Hreik region.”

Prime Minister-designate Tammam Salam said on Friday that his cabinet will only be formed to oversee the upcoming presidential elections and might have a roll in seeking common grounds over the matter between the Lebanese foes.

“We will give the rival parties a last chance to seek consensus over a new cabinet lineup,” Salam said in comments published in As Safir newspaper.

Soaring political tensions and two terrorist explosions that have rocked the country in the past week have brought the efforts of President Michel Suleiman and Premier-designate Tammam Salam to form a new government to a standstill.

Several local dailies quoted highly informed sources as saying on Friday that the possibilities to form a cabinet in the coming days have withered following the bombing that targeted Beirut's southern suburbs a day earlier.

Saudi Arabia rejected a request by the Islamic Republic of Tehran to participate in the investigation with the “emir” of the Abdullah Azzam Brigades, Saudi national Majed al-Majed, who is allegedly detained by the army intelligence.

According to al-Joumhouria newspaper published on Friday, the issue is set to inflict further deterioration in the Saudi-Iranian ties.

The U.N. Security Council rejected all forms of terrorism after a deadly explosion targeted Beirut's southern suburbs on Thursday, urging the Lebanese to preserve national unity and stick to the dissociation policy.

“Terrorism in all its forms and manifestations constitutes one of the most serious threats to international peace and security, and that any acts of terrorism are criminal and unjustifiable, regardless of their motivation, wherever, whenever and by whomsoever committed,” the Security Council said.

A leader in the Salafist Jihadist movement in Jordan announced on Thursday that the al-Qaida-affiliated Al-Nusra Front in Syria and the Islamic State of Iraq and the Levant have officially decided to militarily enter Lebanon.

"Al-Nusra leader Abu Mohammad al-Golani and ISIS chief Abu Bakr al-Baghdadi took the decision to officially and openly enter Lebanon,” the leader told the Washington-based United Press International.

Shelling from Syria Thursday wounded nine Syrian fighters on the Lebanese border who had fled fighting in their country, a security source said.

"Nine Syrians were wounded as a result of cross-border artillery shelling from Syria that struck the area of Khirbet Dawoud in the Arsal countryside," the source told Agence France Presse.

Hizbullah deputy chief Sheikh Naim Qassem on Thursday noted that the “response” to the deadly blast that rocked the party's Haret Hreik stronghold earlier in the day must happen through “political understanding and the quick formation of a national unity cabinet.”

“The criminal bombing that occurred in Dahieh today is part of a series and we cannot tackle it as a separate or extraordinary act,” Qassem told al-Manar television, noting that “the bombing targeted ordinary people and not Hizbullah.”

The United Nations Special Coordinator for Lebanon Derek Plumbly “strongly” deplored on Thursday the car bombing in the Beirut suburb of Haret Hreik, expressing his anger over the recurrent explosions in Lebanon.

"I express my outrage that this is the fourth bomb to have exploded in Beirut’s southern suburbs since July,” Plumbly said in a released statement, noting the “indiscriminate nature of these and other attacks in Beirut and the northern city of Tripoli.”