Authorities said a man remains in serious condition after he was punched in the face late Tuesday on a Manhattan street corner.
Police said victim Paul Martone, 49, did not know his attacker. The two reportedly got into an argument regarding Martone's dog at around 6:30 p.m. as they were crossing the street at the Midtown intersection of West 55th St. and Ninth Avenue.
Video taken from the scene shows the two were arguing when the suspect turned the spat physical by landing a single closed-fist punch with his right hand on the unsuspecting victim's face.
The blow caused Martone's head to land on the pavement and left him with a fractured skull.
The suspect immediately ran off after the punch, leaving the victim in the middle of the Manhattan intersection before he was rushed to a NewYork-Presbyterian/Weill Cornell Medical Center.
He remains in critical condition.
His assailant is described as a male white in his 30s with curly, blond hair. At approximately 5-feet-10-inches tall and weighs about 170 pounds, he was last seen wearing a turquoise T-shirt, blue shorts and gray sneakers.
At least four people have died after being punched and hitting their heads on the floor this year, including a 56-year-old man from Queens who died late June.
Police are asking anyone with information to contact Crime Stoppers at 800-577-TIPS or to submit tips online.
Follow Chester Jesus Soria on Twitter@chestersoria