Ukraine's military has reported Russian drone attacks on several regions overnight, just hours after the end of a 30-hour "Easter truce" declared by Moscow.

Ukraine's air force issued raid alerts for the Kyiv region, as well as Kherson, Dnipropetrovsk, Cherkasy, Mykolaiv and Zaporizhzhia.

In the southern city of Mykolaiv, Mayor Oleksandr Senkevych said "explosions were heard". It was not immediately clear whether there were any casualties.

Russia's military has not commented on the reported attacks. The truce declared by President Vladimir Putin expired at midnight on Sunday Moscow time (21:00 GMT). Both sides accused each other of violating the ceasefire.

Early on Monday residents in several Ukrainian cities, including the capital Kyiv, were urged by local authorities to go immediately to nearby shelters due to the threat of drone strikes.

In the Kyiv region, local officials said air defence forces were "working on targets".

Ukraine's air force also reported a "rocket danger" for central regions, and said Russian aircraft were "active in the north-eastern and eastern directions".

In Mykolaiv, regional head Vitaliy Kim said shortly afterwards that the city had been attacked by missiles. "There were no casualties or damage," he added.

Several hours before the truce expired, Kremlin spokesman Dmitry Peskov said Putin had not given an order to extend it, Russia's state-run news agency Tass reported.

The BBC has not independently verified the claims by Ukraine and Russia.

US President Donald Trump - who has been pushing for an end to the war - said late on Sunday that "hopefully Russia and Ukraine will make a deal this week". He gave no further details.