The killings of PKK founder Sakine Cansiz and two others could be an attempt to derail negotiations between Ankara and the PKK to peacefully end the militant group's separatist campaign.
Three explosions in the capital, including an attack on the presidential palace, could mark a new phase in the rebels' campaign against the Assad regime.
Secretary of State Hillary Clinton said the Syrian National Council could no longer be viewed as the 'visible leader of the opposition.' The group failed to attract broad support from Syrians.
A week after raising Russian ire by grounding a plane traveling from Russia to Syria, Turkey grounded an Armenian airliner – this time in a routine check arranged in a recently inked agreement.
The details of the Turkish grounding of a Syrian passenger plane earlier this week remain murky, but that hasn't stopped Turkey and Syria from trading accusations.
Turkey, already on the brink of a conflict with Syria, may now be facing tensions with Moscow after grounding a flight from Russia on suspicion that it was carrying weapons for the Syrian regime
Several Syrian mortars landed in Turkey today. The two countries have exchanged fire for the past week, though Syria says it does not want a military confrontation.
While the US and other Western nations resist being drawn into the fighting in Syria, Turkey is feeling the direct effects of bloodshed and refugees, putting pressure on Ankara to act.
After Syria shelled a Turkish town yesterday and killed five civilians, Turkey returned fire and went to NATO. However, experts say Turkey's moves are more about deterrence.