The Ukrainian military said Russia has fired at Ukrainian border guards in the northeastern Sumy region in the latest of a series of alleged cross-border attacks over the past few weeks.

Military officials say observers Tuesday night recorded seven shots from Russian territory toward the village of Boyaro-Lezhachi, most likely mortar fire.

The Ukrainian Operational Command North said on its Facebook post that eight other shots were heard Tuesday afternoon near a neighboring village. There were no reports of any deaths.

Meanwhile Tuesday, Russian shelling continues around Ukraine’s second-largest city of Kharkiv, even after Russian troops withdrew from its surroundings last week.

Ukrainian regional officials say the city of Derhachi was hit and a 69-year-old woman died and another person was injured.

Derhachi is southwest of the city of Kharkiv and has previously come under Russian shelling.