Ukrainian forces detected and repelled a Russian infiltration attempt near Myropillia in Sumy Oblast using special technical equipment, engaging with mortars, artillery, and small arms.

Using special technical equipment, [Ukrainian soldiers] detected [the Russians] in a timely manner, and they fired using mortars, artillery and small arms.

The Center of National Resistance had previously warned about the movement of special units from the Main Directorate of the Russian Armed Forces in the Belgorod region, in order to organize sabotage operations in the Sumy region

Russians fired 11 times at the border areas and settlements of the Sumy region on December 15, resulting in 41 explosions.

Bilopillia community was shelled with mortars (13 explosions), artillery (7 explosions), and helicopter-launched unguided missiles (10 explosions).

Nova Sloboda community experienced artillery shelling resulting in 5 explosions.

Krasnopillia community recorded 3 explosions from VOG grenades dropped by a UAV.

Znob-Novhorod community had 3 mines dropped by Russian forces.