A Texas plumber has been receiving threats after a photo emerged of Islamic extremists in Syria firing a high-powered gun from the bed of his old pickup, which still bears his company's logo on the door.

An extremist group, Ansar al-Deen Front, posted the photo of its fighters aboard the Ford F-250 sometime on Monday. That prompted a flood of calls to Mark Oberholtzer, who owns Mark-1 Plumbing in Texas City, and has nothing to do with Syria's bloody civil war.

"How it ended up in Syria, I'll never know," Oberholtzer told The Galveston Daily News.

Oberholtzer told the paper that he traded in the truck three years ago. The Houston dealership he turned it over to, AutoNation, told KHOU.com that the truck was auctioned and was likely traded from owner to owner over the course of three years.

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Oberholtzer was surprised the auto dealership sold the truck with the company’s name still on the door.

"They [AutoNation] were supposed to have done it [covered the decals] and it looks like they didn't do it," he said.

AutoNation did not immediately return a phone call from FoxNews.com.

Oberholtzer has owned the plumbing business for 32 years and said he has received "a thousand" calls and faxes about the photo.

"A few of the people are really ugly," he told the paper. "I just want it to go away, to tell you the truth."

His son told KHOU.com that the family his hard working and has no ties to terror.

"We have nothing to do with terror at all," Jeff Oberholtzer said.