A suicide bomber detonated an explosives-laden car outside security headquarters in Syria's biggest eastern city on Saturday, killing nine people and wounding 100, state media said.

The attack was the the first of its kind in Deir al-Zour since an anti-regime uprising broke out in Syria in March 2011, and the deaths there came as at least another 10 people died elsewhere in the country.

Western diplomatic sources said on Saturday that the recent incidents in the northern city of Tripoli are the “beginning of a Salafist revolution aimed at providing the Free Syrian Army in Homs with ammunition.”

The sources told As Safir newspaper that the “Salafist revolution will begin in Tripoli and gradually expand to Akkar.”

The Syrian letter sent to the U.N. Security Council claiming that al-Qaida and the Muslim Brotherhood are involved in incidents along the Lebanese-Syrian Border is merely an attempt by the Syrian authorities to intervene in Lebanon, An Nahar newspaper reported.

Informed sources told the daily that the Syrian allegations coincide with calls made by a well-known political party in northern Lebanon for the Syrian army to re-enter the country.

Interior Minister Marwan Charbel stressed on Saturday that the Lebanese authorities didn’t find any evidence proof that al-Qaida exists in Lebanon.

“If anyone had any information then they should inform us about it in order to traxk down these groups,” Charbel told al-Mustaqbal newspaper.

Prime Minister Najib Miqati on Friday hit back at Syria over a letter sent by its permanent U.N. envoy Bashar al-Jaafari to U.N. chief Ban Ki-moon about the presence of alleged anti-Syria “terrorists” in Lebanon.

Miqati stressed that “the Lebanese government is fully performing its duty as to combating any type of terror operations, and in monitoring the Lebanese border, controlling the security situation and addressing any security gaps.”

U.N. leader Ban Ki-moon has no "hard" proof that al-Qaida was behind bomb attacks in Syria but is very concerned that terrorist groups are taking advantage of strife in the country, his spokesman said Friday.

Ban said on Thursday that he believed the group founded by the late Osama bin Laden carried out suicide bomb attacks in Damascus on May 10 which left at least 55 dead and nearly 400 wounded.

The Mustaqbal Movement on Friday described a letter sent by Syria to the U.N. about the presence of “terrorists” in Lebanon as “fabricated accusations aimed at diverting attention from the regime’s blatant crimes.”

“The Mustaqbal Movement categorically denies the content of the letter sent by Syria’s envoy to the U.N. Bashar al-Jaafari on behalf of his country to the United Nations and its secretary general Ban Ki-moon, in regard to accusing the Movement of harboring what he called ‘terrorist elements’ from the al-Qaida and Muslim Brotherhood organizations who are seeking to undermine Kofi Annan’s plan,” the movement said in a statement.

Regime forces fired on protesters who took to the streets of Aleppo on Friday, wounding several people at the biggest rally seen in Syria's second city since a revolt erupted last year, as at least 20 people were killed across the country, a rights group and activists said.

The Local Coordination Committees, the main activist group spurring protests on the ground, said security forces killed nine people in the central province of Homs, three in the central province of Hama, three in the northwestern province of Idlib, two in the southern province of Daraa, two in the northern province of Aleppo and a person in the Damascus suburb of Douma.

Colonel Riad al-Asaad, chief of the rebel Free Syrian Army, on Friday accused Arab Democratic Party official Rifaat Eid of “conspiring against the Lebanese state and inviting a foreign Arab army to occupy its North.”

“His remarks do not only disparage the Lebanese state’s prestige, but also the country’s dignity and the dignity of every Lebanese citizen, because Eid is neither a political analyst nor a media analyst, but rather the head of a licensed and armed Lebanese party,” said Asaad in a statement.

Some Lebanese areas near the Lebanese-Syrian border “have become an incubator for terrorist elements from the al-Qaida and the Muslim Brotherhood organizations who are tampering with the security of Syria and its citizens,” Syria’s foreign ministry said in a statement addressed to U.N. chief Ban Ki-moon.

These elements “are seeking to undermine the six-point plan of U.N. Special Envoy to Syria Kofi Annan,” said the letter sent by Bashar al-Jaafari, Syria’s Permanent Representative to the U.N. Security Council.