Following a breakthrough in talks, Russia and Ukraine agree to implement a ceasefire in the Donbass by the end of 2019.
Ukraine's military says pro-Russian separatists have violated a ceasefire in Eastern Ukraine just hours after it was declared, after opening fire on Ukrainian positions with anti-tank grenade launchers and small arms. Ukrainian forces did not return fire.
Russia announces it will fast-track citizenship applications from people living in conflict areas in eastern Ukraine. The European Union calls the move an attack on Ukraine's sovereignty that would undermine any peace agreement.
Ukrainian ecology minister Ostap Semerak warns of a major nuclear disaster if pro-Russia separatists go forward with a plan to flood a mine where a small nuclear weapon was tested in the 1970s. Semerak appeals for international assistance to prevent the flooding.
At the Munich Security Conference, a truce between Russian-backed separatists and the Ukrainian army, per the Minsk Protocol, takes effect Monday. Pending a permanent political agreement, Russian President Vladimir Putin orders that civil registration documents issued in separatist-held areas of Donetsk and Luhansk in eastern Ukraine be temporarily recognized. Ukrainian authorities say this violates provisions in the Minsk agreement. This is the third such agreement because the previous two in 2014 and 2015 were violated. Low-level fighting and artillery fire never fully stopped.
The body of Ukrainian lawyer Yurij Grabovsky, who defended two ex-Russian soldiers charged in Eastern Ukraine with terrorism and waging an aggressive war against the country, is found on the grounds of a former farming collective in Zhashkiv, Ukraine. Grabovsky went missing from Kiev on March 9. Information from one of two men being held in this case led police to the remains.
The European Union extends Russian sanctions for interference in Ukraine another six months, until 31 July 2016. The EU says it's extending the sanctions because the Minsk peace accords would not be fully implemented by the end of this year.
OSCE observers who are monitoring a ceasefire in eastern Ukraine between the Ukrainian military and pro-Russian rebels, reported the presence of a new Russian weapons system in rebel-held territory this week, the 'TOS-1 Buratino' is a thermobaric multiple rocket launcher system which can destroy several city blocks in one strike and cause indiscriminate damage. Only Russia produces the system and it was not exported to Ukraine before the conflict broke out.
A rally of war veterans in Kiev calls for Ukraine to abandon the Minsk II ceasefire agreement and to declare war on pro-Russian separatists in the Donbass region. Despite two ceasefire agreements since September, combat operations, including the use of heavy artillery and ballistic missiles, never stopped.