The attack was carried out by a group of armed men at a nightclub named "La Playa" in the early hours of Saturday in Salamanca, Guanajuato state, said the reports.

Local media earlier reported that at least 13 people were killed at the scene, between four and seven injured people were rushed to nearby hospitals, and one of them died due to serious wounds.

The nightclub is located in the northwestern part of Salamanca, a city affected by disputes between criminal gangs seeking control of the fuel theft from a refinery the state-owned oil company Pemex established in the city.

According to local media, the police found about 70 bullet casings fired by the attackers who later escaped in a van.

Until Saturday morning, the security agencies of Guanajuato had not issued any official information about the incident.