A Syrian man cut off the head of his 15-month-old nephew with a knife before his mother's eyes at a supermarket in Jeddah, Saudi Arabia.

The 25-year-old man cut off the head of the baby following a dispute with his sister and brother-in-law in front of stunned shoppers at the Al-Marhaba supermarket Tuesday morning.

The murderer was in a dispute with the boy's mother and her husband.

The baby's mother and a nearby shopper fainted while other witnesses stood in shock over the grisly murder. The mother is hospitalized.

Eyewitnesses said that the man picked up a knife from inside the store and severed the boy’s head. The mother and a shopper standing close by fainted, while several other stood in shock and disbelief over what had happened.

A police officer, who spoke on condition of anonymity, told Arab News, “The murderer was in a dispute with the boy’s mother and her husband. He chopped off the boy’s head in front of the mother to get back at her.” He added that the mother has been left traumatized and is in hospital. The boy’s father was at work at the time of the incident.

Following the murder, police sealed off the supermarket while forensic experts gathered evidence. Ambulances were also called to the scene. The supermarket reopened for business at around 1.15 p.m. “It happened so quickly. Before people could intervene, the man had cut more than half way through the child’s neck,” said Abu Muhammad, a grandfather in his mid-60s.

A Saudi till attendant at a nearby cafe said, “One of my colleagues went to see what was going on and returned shivering. He saw the kid’s body and so we gave him the day off. He was in a bad state.”

An eyewitness, who lives in the neighborhood, said that the victim’s family lived close by and frequented the supermarket. “I’ve seen the murderer carrying the same child and playing with him on a number of occasions,” he added.

“No one could bear the gruesome sight of the boy’s decapitated body lying on the floor,” said Muneer, a Turkish car mechanic, who works at a garage close by. “How could someone do such a thing? I just can’t understand it... I still can’t believe it,” he said, shaking his head.

When the store reopened, employees were still in a state of shock. A guard, standing at the entrance, stood frozen and oblivious to the rush of shoppers. Pain and anguish were writ large on his face.