Eight police officers have been killed in ambush in northern Mexico.
An official at the Sinaloa state attorney general's office says the gunmen attacked four police cars along a highway in the town of Navolato. A ninth officer was injured.
The official said the gunmen fled, although police found a vehicle several miles (kilometers) from the site that may have belonged to the attackers. The official spoke on condition of anonymity because of security reasons.
Sinaloa is the cradle of a powerful cartel by the same name.
Meanwhile, in the border city of Tijuana, police found the decapitated bodies of two men hung by their feet off a bridge. Their heads were found in a car abandoned on the bridge.