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7:27 PM PT -- It's turning out to be a long day for Kelly. Chief James Craig of the Detroit PD just confirmed to TMZ that roughly a month ago they got information from Chicago PD about an alleged victim, "who made allegations of a criminal sexual conduct incident against R. Kelly."

He states the incident potentially occurred in Detroit back in 2001 -- when the alleged victim was 13. They are currently working on following up with her and her attorney.

2:19 PM PT -- R. Kelly has just been led away in handcuffs.

JUST IN: Cook County Sheriff's Office: R. Kelly taken into custody at a hearing over unpaid child support; he will be be transferred to county jail - @NBCChicago pic.twitter.com/Q2YNAMVnYc @NBCNews

2:03 PM PT -- The Cook County Sheriff's Office tells TMZ ... R. Kelly's headed to jail for failure to pay child support. He'll need to cough up the full amount of dough to be released.

1:35 PM PT -- Deputies just escorted R. Kelly out of the courtroom, and he's been arrested. No official word from court, but it would appear he didn't cough up the $161k.

11:52 AM PT -- R. Kelly just showed up to court in a black sprinter van accompanied by his legal team. We're told the child support hearing is set to begin any minute now.

Right now....R.Kelly arrives for child support court-⁦@cbschicago⁩ pic.twitter.com/naX2cqWXPw @DeidraCBS2

R. Kelly's dangerously close to heading right back to Cook County jail for failing to pay more than $160k in child support.

Play video content TMZ.com

Sources connected to the embattled singer tell us Kelly hasn't covered the $161,633 he owes to his ex-wife, Drea Kelly, and his deadline is today ... Wednesday at 10 AM Central Time. If Kelly doesn't settle up with the court by then, he can be hauled off to jail.

Play video content CBS Morning News

Ironically, Kelly ranted and sobbed to CBS about wanting a relationship with his kids. That interview was taped Tuesday, and we're told he had not paid at that point.

TMZ broke the story ... Kelly actually owes Drea nearly $200k, all told, and he's known since last month he had to pay the minimum amount of $161k by March 6.

Additionally, the D.A. could charge him criminally for failure to pay the support. Any amount over $20k is a felony.

We've reached out to Kelly's attorney, but no word back.