SAO PAULO, Oct. 17 (UPI) -- Military police with riot shields and striking plainclothes detectives clashed in Sao Paulo, injuring at least 22 people, Brazilian authorities said Friday.
Hundreds of black-clad military police fired teargas, stun grenades and rubber bullets at striking civilian officers seeking a 15 percent pay raise as the officers tried to force their way into the Palacio dos Bandeirantes, the seat of the Sao Paulo state government, television reports showed.
Sao Paulo is the capital of a Brazilian state with the same name.
Other military police were on horseback. At one point, a marked police vehicle forced its way through a police cordon.
The city's Albert Einstein Jewish Hospital said it treated more than a dozen people injured in the clash, but did not say if they were police or detectives.
Another hospital said a senior officer involved in the negotiations with the protesters was among the injured, the BBC reported.
Brazilian states generally have two separate police forces -- a uniformed military force in charge of maintaining public order and a state, or civilian, police force responsible for detective work and criminal investigations.