Security forces in Liberia's capital Monrovia have deployed to enforce a quarantine in a large slum area in order to contain the spread of Ebola.
The move set off protests from angry residents in West Point and people gathered at roadblocks to complain.
The president has also ordered a countrywide night-time curfew as part of new anti-Ebola measures.
Since the beginning of the year, 1350 people have died of the virus in four West African countries.
New UN figures show that between 17 and 18 August, there were 221 new cases and 106 deaths.
A top Lagos doctor has just died of the virus, bringing the number of people who have died of Ebola in Nigeria to five, the health ministry said.
Colleagues said consultant Stella Ameyo Adadevo was the first medic to order that a sick patient from Liberia be tested for Ebola when he was admitted in July.
"We owe her a lot; she managed the situation like a thorough professional that she was. She had helped Nigeria to contain the epidemic in her own way," Akin Osibogun, the chief medical director at Lagos University Teaching Hospital, told Nigeria's Premium Times newspaper.