Study finds Ukranian forces have advanced 10 kilometers into Russia

Ukrainian troops have advanced up to 10 kilometers (six miles) into Russia in possibly the most serious border incursion of the conflict, the Institute for the Study of War says.

Ukrainian forces stormed into Russia’s southwestern Kursk region on Tuesday morning, deploying around 1,000 troops and more than two dozen armored vehicles and tanks, according to the Russian army.

Kyiv has not officially commented on the operation.

Russia’s top general vowed yesterday to crush the incursion and push the Ukrainian fighters back to the border.

“Ukrainian forces have made confirmed advances up to 10 kilometers (six miles) into Russia’s Kursk Oblast amid continued mechanized offensive operations on Russian territory,” the US-based Institute for the Study of War (ISW) says in its latest update.

“The current confirmed extent and location of Ukrainian advances in Kursk Oblast indicate that Ukrainian forces have penetrated at least two Russian defensive lines and a stronghold,” it adds.

The advance has centered on the logistical hub of Sudzha, a town of around 5,000 inhabitants located eight kilometers from the Ukrainian border.

There have been scant updates from officials in Moscow.