Russian security forces kill Doger Sevdet, an al-Qaeda emissary who fought alongside Chechen insurgents, in the northern Caucasus region of Russia.
The Pentagon rejects a Russian proposal to stage joint airstrikes against Al-Qaeda linked groups in Syria. [https:--web.archive.org-web-20160521120605-http:--www.voanews.com-content-pentagon-rejects-joint-strikes-with-russia-3339269.html (VOA News)] [https:--www.reuters.com-article-us-mideast-crisis-russia-usa-syria-idUSKCN0YB1HB (Reuters)] [http:--www.huffingtonpost.com-entry-russia-proposes-joint-syria-airstrikes_us_573f28bce4b0613b512a0751 (Huffington Post)]War on Terrorism
NATO reopens informal talks with Russia for the first time in nearly two years. According to the Secretary General of NATO Jens Stoltenberg "NATO and Russia have profound and persistent disagreements, today’s meeting did not change that."
Russian airstrikes on an Al-Nusra Front (Al-Qaeda's branch in Syria)-run prison complex in the northern town of Maarrat al-Nu'man, Idlib, leaves nearly 60 people dead. Most of those killed were rebels imprisoned by Al-Nusra, according to the Syrian Observatory for Human Rights.
The Syrian Observatory for Human Rights reports Russian airstrikes kill at least 18 civilians and wound dozens more in the town of Ariha in Syria's northwestern Idlib province. Idlib is controlled by the Army of Conquest, a rebel alliance of mainly Islamist groups, including al-Qaeda affiliate al-Nusra Front.
Russian air-strikes reportedly kill U.S.-backed Syrian rebels as Russian jets bomb rebel positions in rural areas of northern Syria, including the town of Jisr al-Shughour, which is currently held by Islamist militant groups including Al-Qaeda's branch in Syria, the Al-Nusra Front.