A blast on the outskirts of Syria’s second city Aleppo has killed or wounded several people, activists say.
At least three people were killed in the blast, which targeted a bus in the Tall al-Zarazeer district, said the opposition Syrian Observatory of Human Rights.
At least four people were killed in the city on Thursday when security forces fired on protesting students.
In Damascus, two blasts caused damage on Saturday, but no-one was hurt.
It is not known whether the people hurt in the Aleppo explosion were civilians or members of the security forces, a Syrian Observatory of Human Rights spokesman told AFP.
Violence has continued in Syria despite a ceasefire between government and the opposition forces mediated by the UN and Arab League envoy, Kofi Annan.