Clashes have caused some casualties , a statement from the mayor 's office says . It was unclear what the target was . Police advise residents to stay in their homes as violence erupts . Pro - Russian forces seized Donetsk airport facilities . In response , Ukrainian air and ground forces seized the airport .
Clashes have caused some casualties , a statement from the mayor 's office says . Police advise residents to stay in their homes as violence erupts . Pro - Russian forces seized Donetsk airport facilities . In response , Ukrainian air and ground forces seized the airport .