Turkey has vowed to step up its campaign against the outlawed PKK. The collapse of its cease-fire with the PKK has complicated the US-backed campaign against the self-proclaimed Islamic State.
Russia is a key backer of the Assad regime. Western powers have insisted that Assad must step aside under any peace agreement.
One benefit of the recent shelling that heightened tensions across the demilitarized zone are the highest level negotiations between Seoul and Pyongyang in many years.
Monday's bombing killed at least 20 people and was the worst such incident in Bangkok in years. Authorities have not ruled out terrorism.
At least 3,144 Yazidis are still being held by the self-styled Islamic State, The New York Times reports. Militant leaders cite the Quran in justifying the enslavement of women.
The head of the Taliban's office in Qatar says it was a mistake to have kept the death of spiritual leader Mullah Omar a secret for two years. Then he resigns.
The reclusive leader of the Taliban hasn't been seen in public for more than a decade. The group is engaged in peace talks with the Afghan government.