Zelenskyy's office deputy chief Palisa said this is the first time such plans have been recorded, though he stressed Russia currently lacks the forces to act on any of its territorial ambitions.
The overnight attack on 3 February was already underway when the US President addressed reporters, with temperatures across Ukraine dropping past -20°C.
Several civilians were killed or injured in overnight strikes that also caused power outages on railway sections, delaying several trains and forcing passengers into shelters.
The suspect allegedly gathered information about Ukrainian military units' locations, training facilities, and equipment movements, transmitting coordinates and details through Telegram to Russian handlers.
Russia launched S-300 and Kh-31P missiles along with Shahed drones, Ukraine says it intercepted 24 out of 29 Shaheds across nine regions, while an infrastructure facility in Vinnytsia Oblast was struck.