THIS is the shocking moment a heartless thief was caught on camera robbing a heart attack victim as he lay dying on the floor.

CCTV from an apartment block shows the callous crook bending over the stricken 54-year-old, appearing to check if he was still breathing before rifling through his pockets.

Instead of calling for help, the thief swipes his valuables, shoves them into his own clothes and vanishes.

The stomach-churning footage shows the criminal glancing behind him toward the entrance of the building to ensure the coast is clear before making his move.

Moments later, locals discovered the collapsed victim and called emergency services, but paramedics were unable to revive him.

He was pronounced dead at the scene.

The sickening crime unfolded in the Argentinian coastal resort of Mar del Plata, a popular holiday spot for Buenos Aires residents.

The victim, who has not been publicly named, was identified as a man from the Vélez Sarsfield neighborhood of the capital.

He was staying at the apartment block where he collapsed and reportedly had a history of heart problems.

Police are now hunting the suspect, who was shirtless at the time of the theft, wearing only shorts and a large rucksack.

He struck just before 4pm local time on Sunday, but the horrifying footage only emerged overnight.

Investigators are reviewing additional CCTV footage from the area in a bid to track him down.

While authorities believe the thief was an opportunist who saw the victim in distress and seized the moment, they have not ruled out the possibility that the two men knew each other.

It comes after sick teens took a selfie next to a weeping 92-year-old woman after robbing her.

The masked trio took the twisted snap in front of a mirror while their distressed victim was seen hunched on her bed with her hands tied.

The horrifying moment, captured by the criminals themselves, was posted on social media like a trophy.

The crime took place in the early hours of January 17 in the Vicente Lopez neighbourhood of Buenos Aires.

The gang broke into the elderly woman’s home, gagged her, beat her, and tied her to her bed while they ransacked her house for cash and valuables, reports local outlet El Observador.

They stole wedding rings, a gold chain, an iPhone, and 50,000 pesos, which is around £45.

But before making their escape, they stopped to take a chilling memento — a selfie, with their terrified victim caught in the frame.

Hours later, they struck again in a different neighbourhood, targeting another woman.

This time, they took a 32-inch television before fleeing in a Volkswagen Gol Trend, the same car used in their first attack.