Rwanda has restricted movement across its border with the DR Congo, where an Ebola outbreak has killed more than 1,800 people in the past year.
Parts of the border were closed after a third case of Ebola was identified in the Congolese border city of Goma, where two people have already died.
It is the worst Ebola outbreak in the nation's history: at least 2,700 people have so far been infected.
The outbreak has been complicated by an active conflict zone.
About 12 new cases are being reported every day in the Democratic Republic of Congo, the World Health Organization (WHO) reports.
BBC
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