What to know

• Moscow said hackers posted "false information" on its emergency warnings app after Ukraine reported a suspected breach of its air raid alert system.S1
• The cyber attacks came as the longest truce of the war, limited to Ukraine’s eastern Kherson region, ended on November 1, 2026 after Russia refused the offer of an extension, according to KyivS2
• Thousands of Ukrainians were warned of radiation after the nation's air raid alert system was hacked by "hostile interference".S3