GREENFIELD, Mass. (AP) – A 19-year-old man was stabbed to death during the weekend, and three Northampton men were arrested Sunday and being held on murder charges, prosecutors said.

Police responding to a 911 call found Anthony Alves of Colrain lying on a street in Greenfield at 2 a.m. Saturday with several stab wounds. He was taken to Franklin County Medical Center, where he was pronounced dead. The medical examiner determined Alves died of blood loss due to multiple stab wounds.

Carlos Madera, 19, Joell Madera, 18, and Santos Diaz, 22, all of Northampton, were arrested Sunday, the Northwestern District Attorney’s office said.

All three men were being held without bail and were scheduled to be arraigned Monday.

Each one is held on one murder charge, the district attorney’s office and police said.

Tony Alves, the victim’s father, told the Boston Sunday Globe that police said his son was walking with a friend when he was attacked by a group of youths. He said he was told the youths used steel pipes and a machete to kill his son.