Reports from the capital Conakry say a teenage boy was shot dead by the security forces as the motorcade of the military leader Colonel Mamady Doumbouya passed through the city.

An opposition group says a second young man was also shot.

Police deny this.

Clashes broke out during the day, as demonstrators hurled stones at officers, who retaliated with tear gas.

Several people were arrested.

Guinea's military, which seized power last September, has banned all demonstrations. It It has pledged to move to civilian rule within three years.