Akhir 27, 1432 H/April 1, 2011, SPA -- Ten people were killed in an attack on a bar in the northern Mexican city of Ciudad Juarez, dpa quoted the authorities of the Mexican state of Chihuahua as reporting Friday. The armed attack on the El Castillo bar happened late Thursday, a spokesman for the Chihuahua attorney general's office told the German Press Agency dpa. Most of the victims - nine men and one woman - were around 40. The motive for the attack was yet to be determined. Ciudad Juarez, across the border from the US city of El Paso, Texas, is regarded as the most violent city in Mexico. Some 3,100 people were killed there last year, mostly in incidents that the authorities link to organized crime activities. Massacres with more than 10 dead are not rare.