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.
U.S. President Donald Trump and Ukrainian President Petro Poroshenko, in a telephone call, discuss strengthening the two countries' strategic partnership with particular attention to the conflict in the Donbass, a Ukrainian region that borders Russia.
A Ukrainian court sentences two Russian nationals to 14 years in prison each on charges of fighting alongside Russian-backed separatists in eastern Ukraine. Moscow contends that the two Russians were no longer employed by the state when they were captured.
The Ukrainian Army says eight of its soldiers were wounded in fighting against Russian-backed separatists in the east of the country during the previous 24 hours. A military spokesman said there had been 29 shelling incidents around Mariupol.
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.