Ukraine’s air force announced on Sunday that its air warning app, which allegedly sent false warnings about nuclear and chemical threats in Kiev and other regions, had been compromised.
According to Reuters, the app briefly displayed warnings of nuclear and chemical accidents, as well as warnings of urban warfare. The Air Force announced that an unauthorized person interfered with the app’s operation and temporarily disabled push notifications.
“There is no radiation threat! Stay calm and follow the messages on our channels,” the Air Force said on Telegram, according to a translation.
Two hours later, Russia’s Ministry of Emergency Situations announced that the country’s mobile app had “suffered a major cyberattack, allowing attackers to send false information to the population.”
It was not immediately clear whether the incidents were related. CNBC has reached out to Russian and Ukrainian authorities for comment.
Local ceasefire expires in Oreshki, Kherson Oblast
The alleged cyber attack comes as Russia and Ukraine continue to attack each other’s territory and infrastructure.
A localized ceasefire in the devastated Russian-occupied city of Oreshki and surrounding areas in the Kherson region near Crimea expired overnight. The temporary cessation of fighting allowed humanitarian aid to flow into the city and evacuate hundreds of people trapped with little access to food, water, electricity or medicine.
This is the longest local ceasefire since the invasion began in earnest in early 2022, and both parties appear to have observed the suspension until it ends at midnight Moscow time.
KHERSON, UKRAINE – OCTOBER 28: A man on a bicycle during a ceasefire passes by houses damaged by Russian airstrikes on October 28, 2026 in Kherson, Ukraine. (Photo credit: Ivan Antypenko/Suspilne Ukraine/JSC “UA:PBC”/Global Images Ukraine via Getty Images)
Global Images Ukraine | Global Images Ukraine | Getty Images
On Monday morning, local media reported that Russian forces attacked a hospital in central Kherson, while Ukraine’s military chief of staff said Russia had taken advantage of the ceasefire to strengthen military positions in the city.
“During the ceasefire period, an increase in logistics activities was recorded, including rotation of Russian military units, fortification of positions, expansion of anti-drone measures along roads, and delivery of ammunition,” the military agency said in a statement early Monday.
President Volodymyr Zelenskiy said Sunday that October was Russia’s deadliest month since the invasion began in 2022.
In the past month, Russia has lost 54,400 dead or seriously injured soldiers, “a record for any month of total war,” Zelensky said, adding that the Ukrainian Armed Forces had liberated 96.2 square kilometers of Ukrainian land in October. This is 10.4 square kilometers more than Russia occupied during this period.
