Teen had told classmates he would bring gun to Mexico school

A 15-year-old in Mexico who shot a teacher and two fellow students in the head before killing himself had told some classmates he was going to bring a gun to school the next day, an official said Thursday.

State security spokesman Aldo Fasci said the boy's classmates didn't believe him and apparently did not report it.

"He didn't tell them he was going to shoot it," Fasci said, adding that no action is planned against the classmates for not reporting his comments.

Fasci said the boy appeared to handle the pistol with some expertise because he and his father were avid hunters.

"He was a fan of hunting, and that is why he was skilled in handling guns," he said.

Mexico's first major school shooting shocked the country. President Enrique Peña Nieto said in a televised address late Wednesday that the nation should reflect on the issue.

"These are incomprehensible acts that shake our hearts and require us to engage in reflection," Peña Nieto said.

Fasci said the shooter was declared dead and his family has decided to donate his organs.

The three victims with head wounds remain in very serious condition. A fourth victim shot in the arm has been released from a hospital.