Russia claims Ukraine launched unmanned aerial vehicles to attack a Greek oil tanker off the Black Sea coast, marking the latest in a series of similar incidents in the region.
The Russian military announced a coordinated strike on Ukraine, using Oreshnik missiles, in retaliation for Kyiv's "attack on President Putin's residence".
Russia declares Western soldiers deployed to Ukraine will be legitimate targets, following statements from the UK and France about deploying forces after a ceasefire.
Russia's Geran unmanned aerial vehicles are now carrying man-portable air defense missiles, prompting Ukrainian experts to issue warnings to interceptor aircraft forces.
Ukrainian intelligence claims to have staged the fake death of a commander targeted by Russia for assassination, helping him escape and tricking Moscow out of a bounty.
Deputy Chairman of Russia's Security Council Dmitry Medvedev stated Ukraine would face "inevitable" retaliation for an alleged New Year's Eve attack on civilians in Kherson province, a claim Kyiv has denied.
Russia accuses Ukraine of attacking a hotel in a Russian-controlled area of Kherson, while Kyiv accuses Moscow of continuous assaults on power infrastructure.
President Zelensky announced Ukraine is "about 10%" away from a peace agreement with Russia, but noted that the two sides have not agreed on many key issues.
