At least 11 inmates on Sunday escaped from the Social Rehabilitation Center in the San Pedro Cholula city of Puebla state in southern Mexico. The Puebla state government said in a statement that the jailbreak occurred between 06:00 and 07:00 local time (between 1100 and 1200 GMT) when the prisoners escaped through a hole of about 40 centimeters in diameter. The prisoners, who apparently escaped with the help of prison guards, were considered highly dangerous and held mainly for the crime of murder, said the statement. Prison authorities said that 20 guards, including the prison director, are investigated for their alleged involvement in the incident. Mexican army and the federal police have started to hunt the escaped prisoners, but no positive results haven been obtained so far.