Britney Spears is sedated and resting in the psychiatric unit at Cedars-Sinai Medical Center. A family insider tells PageSix.com that the singer requested that no visitors be admitted and her doctors agreed.

The mother of two responded by locking herself in the bathroom with son Jayden (and possibly Sean) “in an effort to hide from Kevin and then the police.”

The origins of the black-and-blue mark that sent one-year-old Jayden to the hospital along with Britney remains a source of contention.

“Right now we hear that she is telling the police that the bruise was on Jayden when she got him from Kevin,” the source tells PageSix.com. “However, I have been told that the bruise was caused when Britney pulled Jayden into the bathroom. He was afraid, and she forced him.”

“Britney is in a horrible state of mind,” says the source. “Suicidal is an accurate description. She has made threats, in the past, and recently in words such as ‘I should just drop off the face of the planet’ and ‘If I were dead…’”

However, the source assures PageSix.com that Britney might only be a danger to herself and “has never made threats about hurting the boys.”

Although police initially suspected Britney Spears was "under the influence of an unknown substance" during a nearly three-hour standoff with police Thursday night, authorities have since determined Spears was clean and sober.

According to Los Angeles police Officer Ana Aguirre, there was no evidence the pop star had been drinking or doing drugs during the Jan. 3 incident.

"Our understanding is that was not the case," she said.

"There was a time where she was within the residence and wasn't available to be speaking to the officers, apparently," added Aguirre. "There was no threat to the children."

Aguirre confirmed both Spears' children were turned over to her ex-husband Kevin Federline and the pop star was taken to the hospital.

"We're not aware of any type of injuries that she sustained" and she was not combative with authorities, Aguirre said.

Spears is currently at Cedars-Sinai Medical Center, where she is reportedly on a 72-hour lockdown for mental evaluation.
The troubled singer's father, Jamie, reportedly has been at the hospital, by his daughter's side.