Opposition set to address media amid Kenya protests
The president's official residence has been sealed off, and roads leading to important government facilities in the capital have been closed off.
Boakyewaa Lawrencia 
Before joining protesters, Kenyan opposition leaders will speak at a news conference at 14:30 local time (11:30 GMT) in Nairobi, the country's capital.
Riot police have thus far clashed with demonstrators in Nairobi and Kisumu, a town in western Kenya where opposition leader Raila Odinga enjoys a fervent following.
The president's official residence has been sealed off, and roads leading to important government facilities in the capital have been closed off.
