Ukraine’s top military commander says his forces now control 386 square miles of Russia’s neighboring Kursk region, the first time a Ukrainian military official has publicly commented on the gains of the lightning incursion that has embarrassed the Kremlin.

General Oleksandr Syrskyi made the statement in a video posted on August 12 to Ukrainian President Volodymyr Zelenskyy’s Telegram channel. In the video, he briefed the president on the front-line situation.

“The troops are fulfilling their tasks. Fighting continues actually along the entire front line. The situation is under our control,” Syrskyi said.

Russian forces are still scrambling to respond to the surprise Ukrainian attack after almost a week of fierce fighting.

Russian dictator Vladimir Putin said the incursion, which has caused more than 100,000 civilians to flee, is an attempt by Kyiv to stop Moscow’s offensive in eastern Ukraine’s Donbas region and gain leverage in possible future peace talks.

Zelenskyy confirmed for the first time that the Ukrainian military is operating inside the Kursk region. On Telegram, he praised his country’s soldiers and commanders “for their steadfastness and decisive actions.” He did not elaborate.

Speaking on August 12 at a meeting with top security and defense officials, Putin said the attack that began on August 6 appeared to reflect Kyiv’s attempt to achieve a better negotiating position in possible future talks to end the war.

Acting Kursk Governor Alexei Smirnov reported to Putin that Ukrainian forces had pushed 7.5 miles into the Kursk region across a 25-mile front and currently control 28 Russian settlements.

Smirnov said 12 civilians have been killed and 121 others, including 10 children, have been wounded in the operation. About 121,000 people have been evacuated or left the areas affected by fighting on their own, he said.

Tracking down all the Ukrainian units that are roaming the region and creating diversions is difficult, Smirnov said, noting that some are using fake Russian IDs.

The governor of the Belgorod region adjacent to Kursk also announced the evacuation of people from a district near the Ukrainian border.

Ukrainian forces swiftly rolled into the town of Sudzha about 6 miles over the border after launching the attack. They reportedly still hold the western part of the town, which is the site of an important natural gas station.

The Ukrainian operation is under tight secrecy, and its goals remain unclear. The stunning maneuver that caught the Kremlin’s forces off guard counters Russia’s unrelenting effort in recent months to punch through Ukrainian defenses at selected points along the front line in eastern Ukraine.

Zelenskyy said the territory now controlled by Ukrainian forces was used to strike Ukraine’s Sumy region many times, adding that it is “absolutely fair to destroy Russian terrorists where they are.”

“Russia brought war to others. Now it is coming home,” he said in a video posted on his Telegram channel.

Russia has seen previous incursions into its territory during the nearly 2 1/2-year war, but the foray into the Kursk region marked the largest attack on its soil since World War II, constituting a milestone in the hostilities. It is also the first time the Ukrainian army has spearheaded an incursion rather than pro-Ukraine Russian fighters.

The advance delivered a blow to Putin’s efforts to pretend that life in Russia has been largely unaffected by the war. State propaganda tried to play down the attack, emphasizing the authorities’ efforts to help residents of the region and seeking to distract attention from the military’s failure to prepare for the attack and quickly repel it.

Kursk residents recorded videos lamenting they had to flee the border area, leaving behind their belongings, and pleading with Putin for help. But Russia’s state-controlled media kept a tight lid on any expression of discontent.

Retired General Andrei Gurulev, a member of the lower house of the Russian parliament, criticized the military for failing to properly protect the border.

“Regrettably, the group of forces protecting the border didn’t have its own intelligence assets,” he said on his messaging app channel. “No one likes to see the truth in reports, everybody just wants to hear that all is good.”

The combat inside Russia rekindled questions about whether Ukraine was using weaponry supplied by NATO members. Some Western countries have balked at allowing Ukraine to use their military aid to hit Russian soil, fearing it would fuel an escalation that might drag Russia and NATO into war.

Though it is not clear what weapons Ukraine is using across the border, Russian media widely reported that American Bradley and German Marder armored infantry vehicles were there. The claim could not be independently verified. Ukraine has already used U.S. weapons to strike inside Russia.

Italian Foreign Minister Antonio Tajani said in an interview published on August 12 that the weapons provided by his country “cannot be used to attack Russia on its territory.”

Meanwhile, German Defense Ministry spokesperson Arne Collatz said that legal experts agree that “international law provides for a state that is defending itself also to defend itself on the territory of the attacker. That is clear from our point of view, too.”

The ministry said Russian forces also blocked an attempt by Ukrainian mobile groups to forge deep into Russian territory near Kauchuk.

Pasi Paroinen, an analyst with the Finland-based Black Bird Group open-source intelligence agency, which monitors the war, said the toughest phase of Ukraine’s incursion is likely to begin now as Russian reserves enter the fray.

Samya Kullab

Associated Press

KYIV, Ukraine

Gavriil Grigorov (AP)