Ugandan police say they lobbed tear gas to disperse protesters angered by the ouster of Kampala's mayor who is a fierce critic of the country's longtime president.

Deputy Police Spokesman Patrick Onyango said police officers were injured when they were pelted with stones by demonstrators angered by the impeachment of Elias Lukwago as mayor of Kampala, Uganda's capital. He said police responded by firing tear gas

Lukwago was ousted Monday by city councilors as Kampala's mayor after a government tribunal earlier this month found him guilty of abuse of office, incompetence and misconduct.

The charges were brought against Lukwago in May at a time the Ugandan authorities were trying to quell a resurgence of opposition protests against President Yoweri Museveni, who has been in power for 27 years.