Three dead in Nairobi rally blast

An explosion ripped through a park in Nairobi's capital during a packed political rally late Sunday, killing three people and wounding 75, officials said.

The rally was held to protest a draft constitution that Kenya will vote on in August. The president and prime minister support it, but several political leaders do not.

Prime Minister Raila Odinga confirmed the toll of dead and wounded. "It is a very, very regrettable incident," Odinga said at the site of the blast. "We don't know as yet the cause of this incident."

The blast took place in Uhuru Park, in the middle of downtown Nairobi. Hundreds of people attended the rally.