An attack on a Syrian intelligence headquarters in Aleppo killed at least 20 members of the regime’s security forces and 14 rebels, the Syrian Observatory for Human Rights said on Wednesday.

The attack, which began with a powerful bomb blast in a tunnel targeting air force intelligence offices in Aleppo, was aimed at seizing the building but failed,

Sporadic fighting was continuing in the area, it said, but heavy clashes had subsided. […]