Authorities said Wednesday that a shooting attack in north-central Mexico killed eight people, including a baby boy, at two homes.

The assailants apparently targeted four men and a woman who were in the same house.

According to local media, the house on the outskirts of Silao may have been used by drug addicts.

Another man injured in the late-night attack on the home died of his injuries on Wednesday. According to Guanajuato state prosecutors, three other people were injured and were in critical condition at local hospitals.

A 16-year-old girl and a 16-month-old boy were found dead of gunshot wounds at a nearby house. Officials were unsure whether they were also targeted or if they were simply hit by stray bullets from the first shooting.

The killings shocked residents in Guanajuato, Mexico's state with the highest number of homicides.

Guanajuato is one of the most violent states in Mexico in part due to a turf war between two rival gangs. 

Were US arms used in the shooting?

According to the Mexican Foreign Minister, Mexico has filed lawsuits against the top US arms manufacturing companies in a federal court in Boston. 

The main goal, according to Mexican Foreign Minister Marcelo Ebrard, is to get the companies that are being sued to compensate the Mexican government for the damages caused by their practices.

Mexico says that the US arms-producing companies were aware of the damage they were inflicting on Mexico.

It is worth mentioning that Mexican security services confiscated during their operations more than 9 thousand weapons in 2020, most of which are made in the US.