It was near 10 a.m. on Tuesday morning when man spied clown. The clown wore typical big-tent get-up — a wig of red curls, too-big shoes, blue pants, and a shirt with yellow polka dots — topped off with a scary mask, as the witness would describe to Greensboro, N. C., police. The regularly-dressed man, for his part, held a machete.

Knife in hand, he ran after the clown, Greensboro police said, causing the jester to flee into the woods. The witness called the police dispatcher, who told him to put down the blade.

‘‘Officers searched the area,’’ the Greensboro police said in a news release Tuesday afternoon, ‘‘but were unable to find anyone matching the description.’’

The incident seems to follow a script that has repeated itself several times over in the area since late August: Witnesses phone local police to report a menacing clown or clowns, but officers cannot verify the sightings. A few weeks before the North Carolina sighting, a family in Greenville, S.C., told authorities a clown tried to lure their children into the forest near their apartment, as the Washington Post reported. Another witness told police he had spotted a clown near the dumpsters of the same complex.

Since the clown sightings began in late summer, there have been some half-dozen reports.

Mashable recently mapped the alleged sightings along the border between South and North Carolina, forming a sort of harlequin triangle between Greenville to the south and Greensboro and Winston-Salem, N.C., to the northeast.

The lack of police confirmation has cast doubt on the existence of these clowns. And if they are real, the reason for their existence is just as perplexing.

Some speculators have put forth that the clowns may be a viral campaign — possibly for ‘‘31,’’ a new horror movie directed by Rob Zombie featuring homicidal carnival workers.

(If so, it would not be the first time a wandering clown was revealed to be a promotional stunt. At the beginning of August a Green Bay actor copped to walking through the city dressed as a clown holding black balloons as part of an audition for a film. He did not get the part, according to the Associated Press.)

Greenville police announced Thursday that anyone dressed like a clown and terrorizing residents will face arrest.

‘‘It’s illegal. It’s dangerous. It’s inappropriate, and it’s creating community concern so it needs to stop,’’ police chief Ken Miller said at a media conference, according to Greenville Online.

In the North Carolina counties, costumes are not verboten — but officials are encouraging residents to resist putting on clown gear.