Gunmen attacked a Christmas season party early on Sunday, killing a dozen people in the town of Salvatierra in Mexico`s north-central state of Guanajuato, prosecutors said.

State prosecutors also reported that four other people died in a shooting in the city of Salamanca, but did not describe the circumstances of that attack. Local media said the victims in Salvatierra were leaving an event hall following a Christmas party known as a ¿posada¿ when they were gunned down.