The tiny Central American country of Belize is accusing its larger neighbor Guatemala of "amassing" troops along the two countries' border after a 13-year-old boy died in a shooting incident apparently involving Belizean soldiers.

It's a new flashpoint in a long territorial dispute between the two countries. Guatemala claims parts of territory governed by Belize as its own.

Guatemala says teenager Julio Rene Alvarado Ruano, his father and his 11-year-old brother were attacked Wednesday as they planted crops in the border community of San Jose Las Flores.

The Belize government said in a press statement late Thursday that "the current amassing of Guatemalan troops in the border areas ... only adds volatility to the tensions."

Belize said its soldiers were attacked and returned fire in self-defense.