Slideshow: Arizpe Shootout following Cananea murders

An early morning raid in the small mining community of Cananea, Sonora, has left at least four police officers dead and other officers and civilians missing.

It happened at 12:30 a.m. in the community south of Naco, Arizona.

Fox 11 News confirmed with federal police that the raid involved upwards of 50 people in a caravan of vehicles. Those police sources confirm the four dead, but there are other reports two other police officers are missing as well as two civilians.

The target was an armory near Cananea. There is conflicting information as to how many weapons or grenades were taken from the armory.

People who live in Cananea tell Fox 11 News that the entire community is locked down and fearful.

The Mexican military has reportedly surrounded both Cananea and the border town of Aqua Prieta, across from Douglas, Arizona. There are unconfirmed reports the same people who attacked the armory near Cananea are headed toward Aqua Prieta.

A free-lance reporter who covers the border says that today's attack raises to thirty the number of police officers who have been killed in apparent drug-related violence in Sonora this year.

Fox 11 Photojournalist Ruben Fuentes was born and raised in Cananea. He has talked by telephone with several people there who have confirmed the assault and the deaths.

Violence against police in Mexico has been widespread for years, but has just recently spread to Sonora.

Full details of this still developing story tonight on Fox 11 News at 9.