S. Leone declares health emergency amid Ebola

In this photo taken on Sunday, July 27, medical personnel work at the Doctors Without Borders facility in Kailahun, Sierra Leone where Dr. Sheik Humarr Khan died.

FREETOWN, Sierra Leone (AP) — The president of Sierra Leone has declared a public health emergency as the Ebola crisis deepens across West Africa.

The announcement from President Ernest Bai Koroma late Wednesday came as neighboring Liberia also ramped up efforts to slow the virulent disease's spread.

This photo provided by the CDC shows an Ebola virus.AP Photo: CDC

This photo provided by the CDC shows an Ebola virus.

Ebola has been blamed for more than 670 deaths in four West African countries this year, and has shown no signs of slowing down in Liberia and Sierra Leone.

Sierra Leone's leader said that police and military would be aiding health workers, and homes with Ebola patients will be quarantined. He says house-to-house searches will be used to trace those who may have come into contact with sick people.

Koroma declared Monday will be a "National Stay Home Day" in hopes of stopping Ebola's spread.