Half of Ukraine faced air raid sirens early on Monday morning as Russia bombarded the country with aerial attacks.The first sirens sounded moments after the end of a 30-hour Easter truce, unilaterally declared by Vladimir Putin at the start of the weekend.

Russian President Vladimir Putin on Saturday called an “Easter truce” in the war on Ukraine, claiming Moscow would stop “all military operations” until Monday in the first break from Russian hostilities since his forces invaded more than three years ago. The truce will begin at 6 p.m. on Saturday and last through 12 a.m. on Monday, Putin said.