Three missiles crashed into residential areas of Syria’s northern city of Aleppo on Friday, killing at least 12 civilians, activists said, according to BBC News.

Video footage posted online claims to show the aftermath, with people carrying away the wounded and a wide area reduced to rubble, the report said.

An activist in Aleppo told the BBC there are families buried under the rubble in one neighborhood.

The reasons for the latest attack are unclear, and it is also not clear who launched the missiles.

Earlier this week, activists accused the government forces of targeting other areas of Aleppo with Russian-made Scud-type missiles.

An activist called Baraa al-Youssef told Reuters that 30 homes had been destroyed by one of the rockets.

“Nothing can describe it, it’s a horrible sight,” he said.

“At least 12 bodies have been recovered so far and there are more than 50 people wounded,” Syrian Observatory for Human Rights director Rami Abdel Rahman told AFP.

The Britain-based Observatory said the number of victims was likely to rise, as many people were trapped under the rubble of collapsed buildings in the eastern district of Tariq al-Bab.

On Thursday, at least 31 people were killed and dozens more were wounded in a car bombing near the central Damascus headquarters of Syria’s ruling Ba’ath party.

Opposition activists told reporters a car bomb struck a security checkpoint between the Damascus-based Ba’ath party central headquarters compound and the nearby Russian Embassy.

Since the beginning of 2013, some 89,000 Syrians have fled the violence in their native land and crossed the border to safety in Jordan. Many end up settling in the refugee camp near Mafraq, along the border. 

Jordan is preparing the open a third refugee camp to meet the overwhelming numbers as Syrians continue to pour through its border at “historic” levels, The Jordan Times reported Thursday.