Russian attacks across Ukraine have injured at least 25 people in multiple regions, as US-led efforts to revive peace talks reportedly stall, Ukrainian officials said on Tuesday.

In the northeastern city of Sumy, drone strikes injured 15 people and damaged residential apartment buildings as well as a medical facility, according to regional authorities.

Emergency services said rescue operations were repeatedly interrupted due to the risk of further attacks, forcing responders to temporarily withdraw from affected areas.

In the Kharkiv region, three people were wounded in separate aerial strikes, while another three were injured in the eastern city of Sloviansk, officials confirmed.

The governor of the Dnipropetrovsk region also reported four additional injuries following further strikes in the area.

Ukrainian air force said Russia launched two missiles and 143 drones in the latest wave of attacks, adding that air defence systems intercepted one missile and 116 drones.

Authorities said emergency crews continued to respond to widespread damage, including burnt vehicles and destroyed infrastructure in affected communities.

The strikes come as the war between Russia and Ukraine continues with no breakthrough in peace negotiations, more than four years after Russia’s invasion escalated into Europe’s deadliest conflict since World War II.