According to the news outlet Milenio, citing local authorities, the attack took place at around 3 a.m. local time [09:00 GMT] when unknown individuals in several cars opened fire at the gas station's customers, leaving six of them dead and five others with gunshot wounds.
The perpetrators reportedly left, with their whereabouts currently unknown, while some 60 law enforcement officers are currently operating at the scene.
Criminality rates have surged in Mexico over recent years. The spike in violence has been associated with drug production and the confrontation between drug cartels over control of drug transit to the United States.
Last year was marked by a record-high homicide rate in the country – more than 33,000. This year, around 32,600 killings have been committed, according to the authorities.