Mexican marines say they have detained an unlikely band of drug traffickers that includes 12 boys and a woman with a baby who possessed rifles, grenade launchers and drugs.

A navy statement issued Wednesday says the 18 people were caught on New Year's Eve in the town of La Estacion in the northern state of Zacatecas. It alleges they were carrying nine rifles, two pistols, two grenade launchers and packets of marijuana and cocaine.

The navy says the only woman in the group was carrying a baby girl. It doesn't say what authorities did with the baby.

Twelve of the 17 male suspects are said to be minors. Drug cartels often hire youths to work for them and many have been arrested since the government launched its offensive against traffickers.