'The victim never saw it coming,' Philadelphia detective says

Out of nowhere, one of the men punches Jochola in the face, sending him to the ground

Jochola and three other men were filmed as they met in a parking lot

Philadelphia police are trying to determine whether the so-called 'knockout game' led to the death of an unsuspecting landscape worker who was sucker punched seemingly for no reason.

Mardoquo Sincal Jochola, who immigrated to the United States from Guatemala with his brother eight years ago, died of blunt force trauma to the head sustained as a result of a punch thrown by an unidentified man, according to Philadelphia medical examiners.

The incident, which was captured on film, is being investigated, according to the local CBS affiliate CBS 3.

In the video, three men are seen standing near Jochola in what appears to be a parking lot on the 700 block of Adams Avenue in the Lawncrest section of northeast Philadelphia.

An unidentified man (third from the left, wearing a white shirt) throws a punch that connects with the face of Mardoquo Sincal Jochola

Jochola is then seen stumbling a few feet to his right before eventually collapsing to the ground. The suspect and two others then flee the scene

The incident took place in a parking lot on the 700 block of Adams Avenue in the Lawncrest section of northeast Philadelphia

As the men appear to be talking, one of them wearing a white T-shirt is seen throwing a punch which connects.

Jochola then walks a few feet to his right before stumbling to the ground. The three men fled the scene.

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Philadelphia's local CBS station reported that police suspect Jochola was the victim of the 'knockout game' – a disturbing practice in which thrill-seekers and would-be assailants ambush unsuspecting passersby with sucker punches with the goal of 'knocking them out.'

Some of these assaults, which were posted on social media, have resulted in deaths.

Lt. Phillip Riehl of the Philadelphia Police (left) is urging anyone with information about the identity of the suspects to come forward. Jochola's (right) brother says he wants to return to Guatemala

US authorities saw an alarming spike in these kinds of random assaults in late 2013.

'It's clear the victim never saw it coming,' Lt. Phillip Riehl of the Philadelphia Police said.

When asked if this was a case involving the 'knockout game,' the lieutenant said: 'It certainly is a possibility, but regardless of what the motivation is, it's still a pretty scary crime that some person could be walking down the street and be punched for no reason and killed.'

Jochola's brother refused to show his face on camera, fearing he could be targeted by those seen in the film.

He said that his brother would work landscaping jobs.