Libreville/Nairobi  - Fresh violence flared overnight in Port Gentil, Gabon, as opponents of declared presidential election winner Ali Ben Bongo continued their protests, news agency Gaboneco reported Saturday.

Port Gentil, the economic centre of the tiny oil-rich west-African state, saw renewed clashes, looting and vandalism directed at interests of former colonial power France, nearly a week after Bongo, the son of the late Omar Bongo who ruled Gabon for more than 41 years, claimed victory in Sunday's presidential vote.

Gaboneco reported that a police station and an office of French oil-giant Total were set on fire, and that at least two people had died in the violence.

Interior and Defence Minister Jean-Francois Ndongou announced new security measures in an attempt to restore calm to the country.

On Friday a curfew was imposed, after a jail and the French consulate in Port Gentil were been set on fire.

Gabon's constitutional court confirmed Bongo's win on Friday, with 41.7 per cent of the vote. His opponents, Andre Mba Obame and Pierre Mambounda, both claimed victory.

Opposition figures have long accused France of propping up the regime of the late Omar Bongo, and now say the election of his son was rigged. (dpa)