Dakar riots at Abdoulaye Wade's Senegal run-off plans
23 June 2011 Last updated at 17:41 BST
Senegal's riot police have fired tear gas and water cannon at thousands of protesters outside parliament, as MPs discuss changes to the constitution.
The protests continued even though President Abdoulaye Wade dropped one of his proposed changes.
He had wanted to reduce the proportion of votes needed to win a presidential election, and avoid a run-off, from more than 50% to 25%.
The bill also creates the elected position of a vice-president.