Ukrainian President Volodymyr Zelensky says his nation's forces would respond "symmetrically" to Russian attacks.
Easter festivities are muted in Kharkiv as Ukrainians expect fighting to flare up again after a weekend truce.
Since 2010, Orbán has transformed Hungary into what the European Parliament has denounced as a "hybrid regime of electoral autocracy".
Vladimir Putin announced the truce, which will last from Saturday afternoon through Easter Sunday.
Pershore Phoenix Dragon Boat Club is helping Odesa Dragons in Ukraine after a drone strike.
The ambulance departs for its 1,650-mile (2,655km) journey to Kyiv, Ukraine, on Easter Sunday.
Videos have targeted Viktor Orbán's election rival, who could unseat him after 16 years in office.
A Russian drone hit a busy spot in the southern Ukrainian town on Saturday morning, injuring another 21 people.
Six civilians were killed and 40 others injured as Russia launched hundreds of drones and missiles.
