LVIV, Ukraine (Reuters) - Losses are mounting in the northern Ukrainian city of Chernihiv, with 53 people killed by Russian forces on Wednesday alone, the regional governor said on Thursday.

       "We are suffering heavy losses - 53 citizens were killed yesterday," Governor Viacheslav Chaus said.

       The information could not immediately be verified. Russia denies targeting civilians.

       (Reporting by Pavel Polityuk, Editing by Timothy Heritage)