France on Tuesday has reportedly warned Syria against any military intervention in north Lebanon in the wake of repeated bomb attacks in Damascus and Tripoli.

The daily As Safir, citing French sources, said Paris has advised Syria against allowing recent bomb attacks in Damascus and Tripoli "affect Syria's commitment to Lebanon or allowing change in French-Syrian priorities that have been agreed on toward strengthening stability in Lebanon."

It quoted the sources as confirming that ongoing discussions are underway in France to study the possibilities of a Syrian military intervention in northern Lebanon which Syrian President Bashar al-Assad described as "posing a threat to his country's national security."

The source said France is relaying "letters" to Damascus warning it against any intervention "which could take the situation in Lebanon back to square one, in addition to the collapse of the understandings in which a roadmap had been drawn to strengthen stability" in the country.

"It will also lead to dumping huge gains Damascus had achieved in breaking its political isolation," the source added.

As Safir said the French foreign ministry does not see Syria's military buildup along its border with Lebanon as a "scenario" for a Syrian intervention in northern Lebanon.

The paper said north Lebanon had become a "source of concern" to French security authorities, particularly after investigation showed that two leaders of a French-Islamic network made up of nine activists with links to al-Qaida had been in the northern refugee camp of Nahr el-Bared.

As Safir said the two commanders would "soon be tried."

French judge Mark Tredivik, in charge of the terror group case, visited Beirut a few months ago and met a leading Islamist inmate at Roumieh prison, who confirmed he was a member of the French-Islamic network.

The inmate had also confessed to having received advanced military training at an al-Qaida camp in Lebanon.

Assad had stressed that north Lebanon had become a base for extremists and pose a threat to Syria.