Israeli Prime Minister Benjamin Netanyahu and Russian President Vladimir Putin have agreed on a plan to avoid "misunderstandings" in Syria.
Ukrainian President Petro Poroshenko accused Russia of challenging the "entire democratic world" by annexing Crimea and allegedly arming separatist rebels in the east of his ex-Soviet state.
Israeli Prime Minister Benjamin Netanyahu sought Britain's cooperation to "turn back the tide of militant Islam" as he met Prime Minister David Cameron in London.
Russian Foreign Minister Sergei Lavrov discussed the Syrian conflict with US Secretary of State John Kerry for the second time in four days.
Turkish Prime Minister Ahmet Davutoglu vowed to "wipe out" Kurdistan Workers' Party (PKK) militants from their mountain strongholds after 16 soldiers were killed in a rebel attack.
Some 13,000 Palestinian structures in the West Bank are currently under Israeli demolition orders, leaving residents and homes "in a state of chronic uncertainty and threat".
Prime Minister Benjamin Netanyahu said he would not allow Israel to be "submerged" by refugees after calls for the Jewish state to take in those fleeing Syria's war.
Israeli Prime Minister Benjamin Netanyahu said Tuesday he was willing to engage in immediate and direct peace talks with Palestinian president Mahmud Abbas.
Ukrainian President Petro Poroshenko said those behind deadly Kiev clashes that erupted after a vote on autonomy for separatist eastern regions deserved severe punishment.
UN Secretary-General Ban Ki-moon said he was appalled by reports that Islamic State militants had demolished a temple in Syria's ancient Palmyra.
Turkey's almost month-long campaign of air strikes against the Kurdistan Workers' Party (PKK) in the Turkish southeast and northern Iraq will weaken but cannot destroy the Kurdish militant group.
A pro-Islamic State jihadist video has urged Turks to rise up against President Recep Tayyip Erdogan, accusing him of being a traitor who has sided with the United States and Kurdish militants.
UN Secretary-General Ban Ki-moon expressed serious alarm over the upsurge in fighting in Ukraine and called for urgent steps to de-escalate the violence.
The UN's humanitarian chief fiercely condemned attacks against civilians in Syria at a press conference in Damascus on Monday.
A truck bombing claimed by the Islamic State group killed at least 54 people in a Shiite-majority area of Baghdad, the deadliest single attack in Iraq's capital in months.
Iran's Foreign Minister Mohammad Javad Zarif met embattled Syrian President Bashar al-Assad in Damascus, and called on regional countries to "fight terrorism and extremism".
Kiev's public relations war with Moscow scaled new heights as Ukraine released a list of prominent Russian reporters and authors whose books will be banned from sale.
Russian Foreign Minister Sergei Lavrov warned against what he called unfounded claims that Syria has chemical weapons.
OSCE observers based in the separatist stronghold of Donetsk in eastern Ukraine said that four of their vehicles were destroyed in an apparent arson attack at their hotel.