Mexican authorities say at least five federal police officers have been wounded in an armed standoff with state agents in southern Mexico.

The Oaxaca state government says in a statement that between 250 and 300 local police have been barricaded in a police station in the town of Santa Maria Coyotepec for the last 13 days to protest labor conditions.

It says they shot at federal agents who tried to remove them Friday.

Five federal police were wounded in the legs by bullet shrapnel. Their lives were said to not be in danger.

Santa Maria Coyotepec is about 3 miles (5 kilometers) south of the state capital, also named Oaxaca.