Gunmen kill many in Mexican bar

Gunmen have sprayed a city bar in northern Mexico with gunfire, killing 11 people and wounding six others, officials say.

The attack took place in the city of Chihuahua, close to the border with the United States, in a region notorious for violent crime.

The gunmen fired indiscriminately into the Rio Rosas bar on Thursday night, the state attorney's office said.

The masked attackers reportedly escaped from the scene in at least one vehicle.

An official from the state attorney's office quoted by AFP news agency said the attackers had been dressed as police officers.

"[They] entered the Rio Rosas bar in Chihuahua City and shot indiscriminately on the patrons," the official said.

"The attackers arrived in several vans, in false federal uniforms, wearing balaclavas."

The same, unnamed official was also quoted as saying that four of those wounded were in a serious condition in hospital.