Angry demonstrators in Burkina Faso set their parliament building on fire, to protest against President Blaise Compaore, in power for 27 years.
Compaore had scheduled a vote to alter the constitution to allow him to run for re-election at the end of his term next year.
As the violence erupted, the vote was canceled, although the demonstrations continued.
Emergency services say at least three people were shot dead.
Burkina Faso security forces used tear gas and water cannon as crowds swarmed the streets of capital Ouagadougou.
Protesters say they won't go home until Compaore steps aside.
