Rival factions in Kenya have clashed again in an increasingly violent campaign over a constitutional referendum, as authorities appealed for calm and vowed to punish anyone provoking unrest.
Police say Thursday's riot in the central town of Garissa began when supporters of the referendum tried to disrupt a rally held by opponents of the constitution.
Police restored order after the crowd hurled rocks, bananas - the ballot symbol for a "yes" vote - and oranges, representing a "no" vote. At least one person was injured.
Kenyans are to vote on a new proposed constitution in a national referendum on November 21.
The 197-page document allows Kenyan President Mwai Kibaki to retain his wide-ranging powers. Opponents say it fails to establish a strong prime ministerial post, which they argue is needed to balance the president's authority.