Four Ukrainian soldiers killed in rebel attacks since ceasefire came into force - Kiev military source

KIEV (Reuters) - Four Ukrainian soldiers have been killed in attacks by separatists since a ceasefire came into force at midnight on Saturday, a Kiev military source said on Monday. A further 21 Ukrainian soldiers have been wounded, the source told Reuters. (Reporting by Pavel Polityuk; Writing By Richard Balmforth; Editing by Alessandra Prentice)