A man in the Bronx was sucker punched and left knocked out in the middle of the street. Sprawled out on the ground, his pockets were rifled through, and his assailants came back to take photos.

Two suspects approached the 37-year-old man Monday morning in the area of University Heights at 6.10am. One of the men punches the victim squarely in the head.

While the man is unconscious on the ground, suspects other than the two original assailants, go through his pockets. They took his cell phone and identification, according to the NYPD.

The suspect winds up to punch the 37-year-old in the middle of the street, with the suspect's friend looking on

The victim falls to the ground and lays unconscious, sprawled out in the middle of street

While the man is completely knocked out, other people start going though his pockets

Police say his cellphone and identification were taken while he was sprawled out

High-five? The NYPD is looking for the man in the yellow hat who was seen on video knocking out the 37-year-old

Smile for the camera: The NYPD is looking for this man, who they say left a 37-year-old in critical condition after punching him in the middle of a street in the Bronx

Then, the original attackers return to the scene where the man is still unconscious, and take photos of him.

The victim sustained a fractured skull and was taken to St. Barnabus hospital via EMS, where he is admitted in critical but stable condition.

The two assailants walked away from the scene, and at around 6:23am they were clearly captured on camera, smiling, and high-fiving as they sauntered off.

Police are looking for the individual who punched the 37-year-old. He is described as a male Hispanic, in his 20s, with a medium complexion, medium build, black hair and a black, trimmed beard.

The suspect also has tattoos on both of his forearms. He was last seen wearing a yellow baseball hat with a triangle shaped logo, a white t-shirt, denim shorts and black sneakers with yellow trim.

It is unclear if the attackers knew the victim.