Activists have told Reuters that three people have been killed in tank and sniper fire in the Damascus suburb of Harasta.
Rebels in a northern town close to the Turkish border also reported one of their fighters was shot dead by a sniper early on Friday and a Reuters journalist in the town heard what sounded like four rounds of tank fire.
More top news
Temperature will be cooler all round
A number of Britons died in an earthquake in Italy which has killed more than 250 people, a local police official has said.
The Democratic presidential candidate questioned why Donald Trump wanted to be associated with a "prominent right-wing leader".