Activists say an explosion in a car wash in the northern Syrian city of Aleppo has killed at least five people.
In Damascus, at least one bomb exploded on central Thawra Street, destroying nine cars, but causing no injuries.
The blasts come as 50 out of a planned total of 300 United Nations observers are now in Syria to monitor the shaky cease-fire declared on April 12.
The presence of the monitors has not halted daily violence that the UN says has killed more than 9,000 people since protests against the Syrian regime began 14 months ago.
Based on reporting by Reuters and AP