The president of Sierra Leone has declared a public health emergency in an attempt to fight the worst ever outbreak of Ebola.
Security forces will be used to quarantine epicentres of the deadly virus, President Ernest Bai Koroma said.
He has also cancelled a trip to Washington for a US-Africa summit next week due to the crisis.
The tough measures being brought in are similar to those announced by Liberia on Wednesday.
Some 672 people have died from Ebola across Liberia, Guinea and Sierra Leone, according to the World Health Organisation.
UK trials of a vaccine for the Ebola virus began today - but some experts complain that the response has been a long time coming.
A Swansea doctor who took leave to treat Ebola patients in Africa, is back on the wards after three weeks in isolation.
The first British case of Ebola in the outbreak in West Africa has been confirmed. So how would repatriation work are what are the risks?