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The Associated Press
Protesters opposed to President Abdoulaye Wade running for third term in next month's elections shout slogans as they rally ahead of a decision from the country's highest court on the validity of Wade's candidature, in Dakar, Senegal, Friday, Jan. 27, 2012. Senegal's highest court ruled Friday evening that the country's increasingly frail, 85-year-old president could run for a third term in next month's election, a deep blow to the country's opposition which has vowed to take to the streets if the aging leader does not step aside. (AP Photo)

DAKAR, Senegal — Senegal's opposition called on the population Saturday to rise up against President Abdoulaye Wade's decision to run for a third term, a move that foreshadows more unrest after a night of clashes that saw a policeman stoned to death in the normally peaceful nation on Africa's west coast.

The streets of the capital were strewn with debris, sign of the riots that spread from a downtown square to the interior of the country late Friday after the country's constitutional court approved Wade's candidacy in next month's election.

The constitution was changed soon after the 85-year-old Wade took office in 2000 in order to impose a two-term limit. He argues that because the law was not in effect when he was elected, it should not apply to him.

In a statement Saturday, the M23 coalition representing all the major opposition candidates running in the election said the court had betrayed the people.

"A black page has been written in the history of our country by the decision to validate the candidacy of Abdoulaye Wade," the statement said. "We are inviting the population to organize and mobilize themselves to face Wade. The combat has started."

Opposition candidate Macky Sall, a former prime minister under Wade who is now running to unseat him, said they had given "the order" for people to take to the streets. He denied that future protests could turn violent.

Police spokesman Col. Alioune Ndiaye said a policeman had been killed late Friday during the riots that followed the court's verdict. A graphic video posted on YouTube shows a body lying on the ground, a cinderblock lying near his head, as a group of young men hurl more rocks.

"I can confirm that one policeman was killed," Ndiaye said. "He was attacked and he was hit in the head by a brick. He was stoned to death," he said.

Senegal finds itself at a crossroads before the Feb. 26 election. The dispute over the legality of Wade's candidacy is compounded by the worsening economic situation, including spiraling prices and grinding unemployment.

Wade has alienated many former allies as well as the population by giving an increasing share of power to his unpopular son. Corruption scandals have erupted at regular intervals, detracting from the government's achievements which include the building of numerous roads and bridges.

In 2008, an audit of the Ministry of the Family discovered that officials there had billed the government for coffee spoons costing $74 a piece. The entire cutlery set cost Senegal nearly $30,000.