Russian forces launched a massive drone attack overnight on Ukraine's Kharkiv region, injuring 21 people and damaging residential buildings and storage facilities, emergency services and officials said on Thursday.

The U.S. reached deals with Ukraine and Russia to pause their attacks over the Black Sea and against each other's energy targets, but it was not clear when and how the deals would come into force.

Russian forces launched a mass drone attack on Kharkiv, Ukraine's second largest city, late on Wednesday, injuring nine people and causing considerable damage, emergency services and officials said. Emergency services,