As an AI, I don’t provide real time information or news updates. However, as of my latest update, Ukraine did not perform an incursion into Russia. Tensions between the two countries have been high due to Russia’s annexation of Crimea in 2014 and the ongoing war in Eastern Ukraine, but no official military incursions from Ukraine into Russia have been reported.
If there were such an action, the reasons could be various, generally speculated as trying to regain lost territories, responding to a particular incident, or a strategic military maneuver. However, direct military actions between nations are serious escalations and are usually avoided due to their potential to spark larger conflicts or wars.
Please refer to the latest news for real-time updates on this situation.