The UN has warned peacekeeping forces operating under its banner to obey strict rules on sexual conduct.
The UN's Deputy General Secretary, Louise Frechette, said soldiers would be punished if they had sex with minors or prostitutes, or if they traded sex for aid or favours.
The world body has pledged to clamp down on sexual abuses following a scandal involving peacekeepers in the Democratic Republic of Congo.
Ms Frechette made her remarks while visiting Liberia on a tour of UN peacekeeping operations in west Africa. Liberia hosts some 15,000 blue helmets, one of the UN's largest deployments.
Ms Frechette said no cases of wrongdoing had been reported in Liberia, but she said there is a lesson to be learned from recent developments elsewhere in Africa.
