Health officials were combing Monrovia's West Point area that is home to at least 50,000 people to try to stop the virus from spreading further in a country where more than 400 people already have died.
The World Health Organization today urged Liberia and other Ebola-affected countries to screen all passengers leaving international airports, sea ports and major ground crossings.
Those with symptoms of the virus also were urged not to travel. Many airlines have halted services to the capitals of Liberia and neighboring Sierra Leone.
In addition, health workers are complaining about a lack of protective gear. Treatment centers are viewed by many as a place where people go just to die.
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"They are not happy with the way Ebola is being managed and the response that the government is providing," said Koala Oumarou, country director for the aid group Plan Liberia, which is helping the health ministry to raise awareness. "It's where the frustration is coming from."
But little was done Saturday to stoop looters from invading the Ebola quarantine center and taking items covered in bodily fluids that now could only further transmit the gruesome virus, witnesses said.
Ebola is spread through direct contact with the blood, vomit, feces or sweat or sick people.
"This West Point situation really was our greatest setback since we started this fight, and we are working on making sure that we can correct that situation," Liberian Information Minister Lewis Brown told The Associated Press.
The looters took medical equipment, and mattresses and sheets that had bloodstains, said a senior police official, who insisted on anonymity because he was not authorised to speak to journalists.