At least 20 people are killed in authorities- and Kurdish-held areas of Syria in a sequence of explosions, state media say.
Most were killed in the attacks in Tartous, house to the primary Russian airbase in Syria.
A car bomb exploded and as rescue workers approached to help victims, a suicide bomber detonated his vest, state media reported.
Another car bomb hit a checkpoint in Homs and five people were killed in the explosion in Hassakeh, first reports said.
Meanwhile, discussions on the sidelines of the G20 summit in China between Russia and the US have failed to reach agreement US officials said.
Nonetheless US President Barak Obama and Russian President Vladimir Putin agreed they’d continue to look for an all-inclusive ceasefire deal, the Associated Press news agency quoted an unnamed senior US official.
Both sides have already been trying to agree on terms for a partial ceasefire which would enable assistance to be delivered to government-besieged areas of the Syrian city of Aleppo.