The prosecutors' office in the southern state of Guerrero said yesterday the attack occurred in Cuajinicuilapa, a town near the border with Oaxaca state on the southern Pacific coast. Some in the crowd apparently shot back at the attackers; prosecutors described it in a statement as "a confrontation."
Two of the dead were under the age of 18.
According to a law enforcement official who was not authorized to be quoted by name, one of the dead was a 12-year-old boy whose father allegedly headed a local crime gang. However, police were unable to confirm the motive in the attack.
In the resort of Acapulco, further to the west, unidentified assailants opened fire on an amateur soccer match on the outskirts of the city, killing three people on Sunday.
A law enforcement official in the city said one other person was seriously wounded in the attack. The official also was not authorised to be quoted by name.
The motive in the attack was still under investigation. The dead and injured were apparently spectators at the match. Shell casings recovered at the scene indicate that assault rifles were used in the attack.
