The United States said Sunday it would double its aid to Syria's opposition, including with new non-lethal military equipment, but paid no heed to calls for arms supplies or a direct intervention.

In a statement after talks among the pro-opposition "Friends of Syria" group in Istanbul, Secretary of State John Kerry said U.S. assistance to the opposition would double to $250 million (191 million euros).

A U.S. teenager has been arrested on terrorism-related charges and accused of seeking to join an al-Qaida-affiliated group in war-torn Syria, the FBI said Saturday.

Abdella Ahmad Tounisi, 18, was arrested Friday night as he attempted to board a flight from Chicago's O'Hare International Airport to Turkey, which borders Syria, the FBI said.

Syrian gunmen kidnapped two shepherds of the same nationality in the northern Akkar region and took them back to Syria, the state-run National News Agency reported on Saturday.

“The shepherds were captured in the kherbet al-Rumman-Shekhlar area of Akkar and were taken to Syria,” the NNA elaborated.

Three Syrian nationals were wounded when a bus carrying them to Lebanon overturned near the Masnah border crossing, the state-run National News Agency reported on Saturday.

“The bus that was coming from Syria overturned before reaching the General Security checkpoint in al-Masnah,” the NNA said, noting that the bus has a Syrian number plate.

Syria's opposition on Saturday called on international supporters to carry out "surgical strikes" on positions used by President Bashar Assad's regime to fire missiles on civilians.

Voicing frustration at the lack of a strong international response to Syria's crisis, the Syrian National Coalition urged Western and Arab countries gathered for a "Friends of Syria" meeting to take immediate action.

A meeting was held recently between Secretary-General Sayyed Hassan Nasrallah and supreme leader Ayatollah Ali Khamenei, the Central News Agency reported on Saturday.

According to the news agency, Nasrallah held talks with senior Iranian officials during his visit to Tehran, where he met with Khamenei.

Five shells from Syrian territories landed on Saturday in Lebanese villages along the northeastern border with Syria.

Two shells targeted Sahlat al-Mayy region on the outskirts of the town of al-Qasr in northeast of the Hermel district.

A Hizbullah member was killed in the ongoing battles in the neighboring country Syria, media reports said on Saturday.

According to MTV, Mohammed Asaad died recently in the clashes in Syria as European Union foreign ministers are set to discuss on Monday fears over Hizbullah's involvement in the battles.

Syria's main opposition National Coalition said on Saturday that Russia was "out of step" with history for backing President Bashar Assad's regime and was isolating itself on the international scene.

"Russia is keeping up a foreign policy that only looks at things from a narrow military perspective, and which does not understand the profound historic changes caused by the Arab Spring," the Coalition said.

Caretaker Interior Minister Marwan Charbel reiterated on Saturday calls for the donor Arab and other states to meet their promises and pay the aid set to assist with the influx of Syrian refugees.

“The friendly countries that pledged to aid us during Kuwait conference should swiftly meet their promises to enhance the conditions of the refugees,” Charbel said during a meeting at his ministry in the presence of UNHCR Representative in Lebanon Ninette Kelley.