Twin deadly blasts caused by car bombs hit two sites of Syrian government forces in northern Aleppo province Friday, leaving 28 people killed and other 235 injured, said Syria's official media, blaming the attacks on armed groups backed by foreign plot.

Syria's state TV said the first blast targeted the Military Intelligence Directorate at the New Aleppo neighborhood. It said the blast also occurred near a park where children were playing, claiming that children were among the killed in that explosion.

The second blast was detonated outside the headquarters of law- enforcement force in Arkoub neighborhood in the city.

The state TV aired footage of the blast sites, showing piles of debris and some remains of bodies on the streets, as well as some damaged buildings in the area.

The explosions are the first two to have occurred in Aleppo, the second largest city and the economic power house of Syria, but not the first to hit security and army compounds in Syria.

Last month, a suicide bomber blew himself up near a police station in al-Midan neighborhood in the capital of Damascus, killing 26 people, including policemen and civilians, and leaving dozens wounded.

On Dec. 23 of 2011, twin suicide bombings targeted two intelligence centers in Damascus, where 44 people were killed and 166 others injured.

Aleppo has remained relatively calm during the past 11-month- old turmoil in other parts of the country. The Syrian government accuses armed groups of trying to prompt Aleppo to take part in the anti-government movement.

In an interview with France24, a figure from the Free Syrian Army (SFA), under which the allegedly army defectors grouped, claimed that his group carried out the attacks on two security headquarters in the city, denying, however, responsibility for the car bombings.

Later, head of the FSA Col. Riad Asa'ad said his militia was not involved and blamed the attacks on the Syrian leadership.

Meanwhile, Sergei Ryabkov, Russia's deputy foreign minister, held the Syrian opposition responsible for the escalation of violence in Syria along with their western backers.

"The Syrian leadership has assured us of its readiness to quickly hold a referendum on a new constitution and move toward elections," said Ryabkov, suggesting that "this means that the opposition bears full responsibility for improving the situation and finding a way to stop the bloodshed."

"Western states that push the Syrian opposition into uncompromising measures, which arm them and give them advice and instructions, are accomplices in the process of inflaming the crisis," he told the official ITAR-TASS news agency.

On Thursday, Russian Foreign Ministry spokesman Alexander Lukashevich expressed Russia's concern about recent reports by Israeli media that British and Qatari troops had been sent to Syria.

In a press conference in Moscow, Lukashevich said that the ministry will check about these news as they arouse concern if it was proved to be true.

The Israeli Debka-Net cited what it called "exclusive military and intelligence sources" as saying that "British and Qatari special operations units are operating with rebel forces under cover in the Syrian city of Homs just 162 km from Damascus."

"The foreign troops are not engaged in direct combat with the Syrian forces bombarding different parts of Syria's third largest city of 1.2 million. They are tactical advisers, manage rebel communications lines and relay their requests for arms, ammo, fighters and logistical aid to outside suppliers, mostly in Turkey, " Debka added.

It said "our sources reported that two foreign contingents have set up four centers of operation - in the northern Homs district of Khaldiya, Bab Amro in the east, and Bab Derib and Rastan in the north. Each district is home to about a quarter of a million people."

Some observers believe that the presence of foreign units was the center of the talks between Syrian President Bashar al-Assad and the Russian Foreign Minister Sergey Lavrov.

Syria has from the start accused armed groups backed by a foreign conspiracy of being behind the country's turmoil.

Syria's official media has recently said that a number of Arab and Afghan jihadists have been fighting alongside the rebels in some restive areas in Syria, mainly the city of Homs, which is witnessing severe clashes between troops loyal to Assad and armed groups allegedly comprised of defectors.

Last week, former Libyan rebel fighters from the city of Misrata announced the deaths of three Libyans fighting against the Syrian regime, according to the Financial Times (FT).

The FT said many former rebel fighters speak approvingly of heading to Syria to join an increasingly armed uprising against the Damascus regime.

"Actually, we cannot stop anyone from going to Syria," Ashour Bin Khayal, the career diplomat now heading Libyan foreign affairs told the FT.

Libyan Foreign Ministry on Thursday announced its decision to expel Syria's charge d'affaires and his staff, adding that it expects all Syrian diplomats to leave the country within the next 72 hours, a Xinhua correspondent in Tripoli reported.

The foreign ministry also said Libyan's National Transitional Council now stands in solidarity with the Syrian National Council (SNC), an umbrella opposition group, and voiced its condemnation against the unabated bloodshed plaguing Syria.

Meanwhile, the Doha-based al-Jazeera TV cited "activists" as saying that 61 people were killed by gunfire of the army and security personnel across Syria Friday, adding that 39 of them were killed in Homs alone. the report, however, couldn't be independently checked.

The Syrian government said more than 2,000 army and security personnel have been killed during the months-long unrest, while the United Nations put the death toll in the country at more than 5,400.