COLUMBIA, South Carolina (AP) — Three men affiliated with a Mexican drug cartel kidnapped a South Carolina man and held him for ransom for nearly a week in a dispute over $200,000 in marijuana, U.S. authorities said Wednesday.

The man was blindfolded and bound at a North Carolina home before FBI agents traced phone calls from his abductors and stormed the residence, rescuing him mostly unharmed, authorities said. His identity was being withheld for his safety.

The kidnapping began early July 9 when the three men, posing as police officers, pulled the man over as he was going to work. His truck, still running, was left on the side of the road with its door open.

Ransom demands were sent to the man's family within hours of his disappearance and continued for several days.

The man was involved in delivering cocaine, marijuana and money throughout South Carolina and North Carolina, according to a complaint filed in federal court. He is not in custody and does not face any charges.

"Right now he's a victim, and we will have to look at that very carefully," said FBI agent David Thomas.

Several months ago, the man received about $200,000 worth of marijuana from the cartel and delivered it to another dealer, but he could not repay the cartel, according to court papers. Authorities are not sure whether he stole the marijuana or was ripped off by the dealer.

The night he went missing, the man's fiancee began receiving calls demanding up to $400,000 for his return. Agents traced the calls to Mexico and then to North Carolina. Early Tuesday morning, agents raided a home and found him bound and in chains, being guarded by two men.

The three men were held without bond pending a detention hearing before a federal magistrate judge scheduled for next week. Elizabeth Luck, a spokeswoman for the Federal Public Defender's Office, said she could not comment.

Officials said the three defendants will likely face extradition to South Carolina.

Court documents did not say what cartel they were associated with.

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Kinnard can be reached at http://twitter.com/MegKinnardAP