Troops were called to Colombo Magazine Prison following clashes involving dozens of prisoners. (AP PHOTO)Troops were called to Colombo Magazine Prison following clashes involving dozens of prisoners. (AP PHOTO) Credit: AAPThree inmates are dead and more than 20 are injured after two separate prison clashes in Sri Lanka, a government minister says. Prison officials could not immediately be reached for comment. Separately, prison officials used tear gas to control inmate protests at the Pallansena Correctional Center on Friday.