Liberian opposition leaders postponed an anti-government rally planned for Monday until January 6, citing a lack of protection for would-be protesters.

Liberians began voting on Tuesday to select either former international footballer George Weah or Vice President Joseph Boakai as their new president, in a vote that analysts say is too close to call.

The four remaining patients infected during Liberia's recent string of Ebola cases have recovered, meaning there are currently no confirmed cases in the country though more than 100 people are still under surveillance, a health official said Friday.

"There are no Ebola cases anywhere in Liberia as we speak," Deputy Health Minister Tolbert Nyenswah told The Associated Press.

Liberia said on Wednesday a second patient had died in a resurgence of the Ebola virus and the outbreak had spread to its capital city.

The sixth confirmed case since the virus re-emerged at the end of June was a healthcare worker in Monrovia, chief medical officer Francis Karteh said on state radio.

Liberia announced the return of the deadly Ebola epidemic on Tuesday, more than six weeks after the country was said to have eradicated the virus.

"A new case of Ebola has been reported in Margibi County. The person has died and was confirmed positive before death. He has been buried," said deputy health minister Tolbert Nyensuah.

More than 200 heavily-armed Ivorian farmers have seized a forest in Liberia, scattering terrified inhabitants in an incursion described in parliament as a "national threat", a security source and locals said Friday.

The security source, providing details of an occupation first raised in Liberia's senate earlier in the week, said the ethnic Mossi tribespeople were claiming the land for their country.

U.N. peacekeepers routinely trade sex for money, jewelry, cellphones and other items in countries where they are deployed in clear violation of U.N. rules, according to a draft U.N. report.

A third of allegations of sexual exploitation and abuse by U.N. personnel involve a minor under 18, according to the report by the Office of Internal Oversight Services (OIOS) obtained by AFP on Thursday.

Armed men have crossed into Liberia from Ivory Coast and occupied an area of forest, spreading alarm in the remote border region, a lawmaker said on Wednesday.

The alleged incursion -- which could not immediately be independently verified -- would mark a worrying development in a campaign of violence by militants crossing in the other direction that has displaced thousands and claimed dozens of lives in the border area.

In February last year a gang of men with machetes ambushed two villages in western Ivory Coast, disemboweling a soldier and pulling out most of his organs before slaying three of his colleagues.

The attack marked the brutal resumption of a campaign of violence blamed on militants crossing from Liberia that has displaced thousands and claimed dozens of lives in the border area.

Peter Kollie was digging for gold in the forests of southeastern Liberia when the deep shaft he had carved out of the earth collapsed, turning into a dark, airless tomb.

But that was a risk the 20-year-old, like thousands of desperate and impoverished young men working the illegal gold-mining camps of the border region by Ivory Coast, had been prepared to take.