(Xinhua) -- A Lebanese security source said the Lebanese army would likely launch a "massive operation" against the Palestinian refugee camp Baddawi located in northern Lebanon if security concerns were justified, local Naharnet reported Saturday.

"The Lebanese army would likely carry out a massive operation against Baddawi, if investigations prove that those responsible for the recent bombing attack against the Lebanese army had took refuge in the camp," the security source was quoted as saying on condition of anonymity.

A car bomb Monday hit an army military bus in the northern city of Tripoli, killing seven people and wounding 32 others, most of the casualties were Lebanese army soldiers.

Following the attack, former Prime Minister Najeb Mikati told LBC TV that he blamed for Monday's attack fundamentalist Islamic groups who were involved in last year's clashes with the Lebanese army in the Palestinian refugee camp of Naher al-Bared in north Lebanon.

Islamic group Fatah al-Islam fought fierce battles during May 2007 with the Lebanese army, and most of its militants were killed or arrested except for its leader Shaker al-Abssi who was still on the run.

Meanwhile, the security source said, "Syrian army had no intention to return to Lebanon." Lebanese pro-government leaders have been accusing Syria of using the pretext of northern Lebanon security situation to interfere in Lebanon again.

"Syrian troops build-up along the border with Lebanon was aimed at providing the Lebanese army with backup if the army decides to put an end to the Sunni fundamentalist Salafi movements in northern Lebanon," the source added.

Syria had reportedly deployed some 10,000 soldiers at its borders with Lebanon last month to prevent smuggling.