Syrian president's office denounces the 'terrorist' attack and pledges to pursue accountability for perpetrators.
PA accuses Israel of waging an 'all-out war' on the Palestinian people to carry out 'ethnic cleansing' plans.
A bombing at a Moscow apartment building killed paramilitary leader Armen Sarkisyan.
Police say Abdirahman Shirwac Aw-Saciid, head of the group's assassination squad, surrendered to authorities.