Voters are casting ballots Sunday in Senegal, where President Abdoulaye Wade's decision to seek a controversial third term has triggered several violent demonstrations.

Opponents say the 85-year-old leader's bid for a third term is unconstitutional following a reform he signed into law in 2001 that limits presidents to two terms.

But the presidentially appointed Constitutional Court ruled last month that reform did not apply to Mr. Wade because it came into effect while he was already in office.

President Wade is attempting to extend his 12-year rule of the west African nation.

The elections are taking place following weeks of street riots during which protestors throwing rocks and erecting fiery barricades clashed with police firing tear gas and rubber bullets. At least six people have been killed in the anti-government protests.

President Wade is running against 13 other candidates, including two prime ministers, who served during his rule.