Johnson-Sirleaf is set to secure a second term in the poll, the West African state's first locally organized presidential contest since a civil war, after her rival Winston Tubman withdrew in protest against alleged fraud in the first round.

At least one person was shot dead after Tubman supporters clashed with Liberian and United Nations security forces in the capital Monrovia on Monday. A Liberian police officer was detained by U.N. peacekeepers after he admitted to firing live rounds during the clash, Liberia's police inspector said.

"We don't want any trouble. But monkey and baboon not getting along," said a Monrovia resident who called himself Tarr. Liberians have nicknamed Johnson-Sirleaf 'monkey' and Tubman 'baboon' and frequently used stuffed animal mascots during campaigning, according to Reuters.

Tubman, a Harvard-educated former U.N. ambassador, seized on the clashes to criticise Johnson-Sirleaf.
"It shows to you why the Liberian people are determined to get rid of this leader. She is somebody who will use violence against peaceful people," he said.

Radio station shut down

Two radio stations -- King FM and Love FM -- which are seen to support Tubman and running mate and former football star George Weah were shut down overnight.

"Armed policemen came to the station while we were giving news. They put a journalist under gunpoint and asked him to leave. They brought a (court order) based upon the complaints by the justice minister and the minister of communication," Paul Mulbah, station manager for Love FM.

"It is unfortunate. We have gone back to the old days."

A spokesman for the government confirmed that they had shut down the radio stations but declined to give further details. The government also called the rally an illegal provocation and urged voters not to be intimidated on Election Day.