A bomb attack, on a densely populated quarter of Aleppo has killed at least 30 people with 60 others injured, according to Syria's state-run news agency.
SANA news also said, that two hospitals, a school and several houses were destroyed. Most of the victims are doctors, nurses and patients in the hospitals.
"The explosion rocked the region of the Malaab al-Baladi. Near the site of the explosion, there is a school housing displaced persons," security source said.
"The car bomb was able to pass through a military checkpoint," he added.
An eyewitness spoke to Al Arabiya TV via Skype, saying that the force of the blast caused great damage to the nearby buildings and created a big crater in the ground. Bodies of women and children were buried under piles of debris.
In a separate incident, four people were killed and others wounded in an explosion by a bomb, which was planted in a bus on the route from Homs to Messyaf, SANA news reported.
No group has yet claimed responsibility for the attacks, but Syrian regime blame outlaws, saboteurs, and armed terrorists are behind the attacks.
In related news, according to the Syrian Observatory for Human Rights, more than 27,000 people have been killed since the Syrian conflict erupted in March 2011. Among the 27,279 victims identified, more than 70% were civilians who sided with the opposition. The regime forces have lost 8,000 of its members.
Meanwhile, international mediator Lakhdar Brahimi, on Monday, begins his Syria mission by meeting Arab League officials and Egyptian leaders before heading to Damascus, on his first official trip to the region, according to his spokesman.
Brahimi's spokesman Ahmad Fawzi, also said that the date of Brahimi's visit to Syria, will be fixed once the final details of his programme of meetings are set.
Previously, Iran's Faras news reported that, after Damascus, Brahimi would go to Tehran to discuss a possible Syrian peace settlement scenario. Fawzi neither confirmed nor denied this information.
According to MENA news, Lakhdar Brahimi is scheduled to meet with President Mohamed Morsi, Foreign Minister Mohammed Kamel Amr and Secretary General of the Arab League Nabil al-Arabi on Monday.
In a related development, Iran, an ally of Damascus regime, said it was joining officials from Egypt, Saudi Arabia and Turkey for a four-way "contact group" meeting looking at ways to calm the conflict in Syria.
For his part, Iran's foreign ministry spokesman Ramin Mehmanparast told Iran's Al-Alam Arabic-language broadcaster that deputy foreign minister, Hossein Amir-Abdollahian left Tehran for Cairo to take part in the meeting.
Abdollahian told reporters at Tehran airport that, Iran's support for the Syrian people and Bashar al-Assad’s reforms within the context of the resistance front will continue.
What is happening today in Syria is burned land policy. And what is happening in Cairo and New York is policy of wasting time.
U.S. Secretary of State Hillary Clinton said yesterday that Assad will not accept any international decisions and obviously he will not either accept the decision of the Arabs.
The economic sanctions imposed by the international community on Syria regime are compensated by Iraq, Russia and China. Therefore, are the political sanctions on Syria feasible to continue?
I think that it so clear, even for people who does not understand the language of politics, that a military solution is the only choice, why then are all these meetings held, in addition to supporting the Free Syrian Army with weapons secretly? However the international community is very keen to deny, in public, that it is behind the ongoing civil war in Syria.
Assad witnessed the end of Ben Ali regime, the Mubarak regime and killing of Gaddafi. For sure, he knew how to exceed their mistakes. Does the international community have to wait for more time, till the number of victims reach a million in Syria to save civilians therein?