Police detectives are trying to figure out who walked up to a man in downtown Charleston and punched him once in the face early Sunday, an agency spokesman said Monday.

Officers from the Charleston Police Department were flagged down around 12:45 a.m. and found the man bleeding in front of a beauty salon at 455 King St. The location is near several bars and restaurants.

There, a woman told the authorities that a man had hit her 26-year-old husband from Bluffton, according to an incident report.

The assailant, described as a 6-foot to 6-foot-4-inch white man with a stocky build and short light-brown hair, ran away toward Warren Street, the document stated.

Police spokesman Charles Francis added that three other men were with the attacker, who was wearing a polo shirt and khaki shorts at the time.

The victim was conscious and talking after the assault, the police said.

None of the paperwork about the alleged crime mentioned a possible motive, but the victim's wife told officers that she, her husband and their group had passed the assailant before the attack, the report stated.

"It's under investigation and police are trying to determine a motive," Francis said.

In April, about one-tenth of a mile north of Sunday's attack, 27-year-old Clinton Thomas Seymour of Johns Island was killed after he was punched and fell to the sidewalk during a confrontation between his friends and another group.

In that case, the police said a joke might have sparked an argument between the groups. A 24-year-old Mount Pleasant man was arrested on a charge of involuntary manslaughter.

People with information about Sunday's incident should call dispatchers at 843-743-7200 and ask for the on-call detective or contact Crime Stoppers at 843-554-1111.

Reach Andrew Knapp at 937-5414 or twitter.com/offlede.