“I had promised the great people of this nation (Syria), and I promised God that I will resign if things reached some red lines, and I will keep my promise today and announce my resignation from the National Coalition; so that I can work with freedom that is not available inside the official institutions,” Moaz al Khatib said in a statement on facebook.

He did not explain what had prompted his resignation.

“Our message to everyone is that the solution to the Syrian crisis will be taken by the Syrians, and the Syrians alone,” he added.

Neither the Coalition’s presidential office nor its general assembly has accepted Khatib’s resignation, AFP reported.

The surprise resignation comes just days after the first election in Istanbul of a rebel prime minister, Ghassan Hitto, and just over two years on from the outbreak of a popular revolt against President Bashar al-Assad.

“For the past two years, we have been slaughtered by an unprecedentedly brutal regime, while the world has looked on,” Khatib said.

Hito, chosen from 12 candidates, is the second Kurdish opponent who took a senior official position in Syrian opposition after Abdulbasid Seyda.

Until last year, Hitto was a senior IT executive at a technology communications company in Texas.

Hitto’s election follows two failed attempts to form interim governments due to a lack of consensus between the opposition.

Meanwhile, leaders of Syria’s main opposition group will attend an Arab League summit this week, the Qatari prime minister said on Sunday, according to AP.

The Arab League has suspended Assad’s membership and recognized the Syrian National Coalition (SNC) as the legitimate representative of the people of Syria.

Arab League foreign ministers agreed March 6 to arm Syrian rebels, and invited the opposition coalition to take the League seat.

Hitto , who will now be in charge of forming a government based inside Syria won 35 out of 48 votes cast by the Syrian National Coalition’s 63 active members after an hours-long meeting in Istanbul, according to Al Jazeera.

Hito, chosen from 12 candidates, is the second Kurdish opponent who took a senior official position in Syrian opposition after Abdulbasid Seyda.

Until last year, Hitto was a senior IT executive at a technology communications company in Texas.

Hito was born in Syrian capital in 1963, received an MBA from Indiana Wesleyan University in 1994.

Hitto’s election follows two failed attempts to form interim governments due to a lack of consensus between the opposition.

The latest effort to set up a transitional government in the rebel-controlled areas comes after two years of bloody conflict in Syria.

Meanwhile in a related development, Lebanese President Michel Sleiman on Tuesday denounced as “unacceptable violation of Lebanese sovereignty” air raids carried out by Syrian warplanes against targets inside Lebanese territory.

U.S. State Department spokeswoman Victoria Nuland also condemned the incident saying that it “constitutes a significant escalation in the violations of Lebanese sovereignty that the Syrian regime has been guilty of. These kinds of violations of sovereignty are absolutely unacceptable.”

France also said on Monday President Bashar al-Assad’s forces had seriously violated the sovereignty of Lebanon.