Updated

Police in Kenya have fired tear gas on crowds in the capital who gathered in support of Prime Minister Raila Odinga.

Odinga on Saturday planned to file a case with the Supreme Court over what he says is massive fraud that took place during the country's March 4 election.

Uhuru Kenyatta won the election with 50.07 percent of the vote. Saturday is the last day Odinga can file a petition to protest the result.

Kenya's election has been largely peaceful, unlike the 2007 vote that sparked two months of violence that killed more than 1,000 people.

The police had warned Odinga supporters that they would not allow them to gather Saturday. An Associated Press reporter at the scene said the supporters were not demonstrating or being violent when fired on.