KOSICE, Slovakia (Reuters) - At least 21 civilians, including two children, were killed in a Russian air strike on a residential street in Ukraine's northeastern city of Sumy late on Monday, the regional prosecutor's office said in a statement on Tuesday.

       The bodies were recovered by emergency services early on Tuesday in searches that are ongoing, it said.

       (Reporting by Max Hunder; Writing by Alessandra Prentice; Editing by Catherine Evans)