Actress Amanda Bynes' parents are considering seeking a conservatorship similar to one obtained for singer Britney Spears, according to a source familiar with the "Hairspray" star's latest run-in with authorities.

After being detained Monday by Ventura County sheriff's deputies, Bynes is currently being held for an involuntary mental health evaluation, authorities said.

Bynes was stopped after igniting a her pant leg while setting a small fire with a gas can in the driveway of a Thousand Oaks home, according to deputies and witnesses. The actress grew up in Thousand Oaks, where her father had a dental practice.

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Bynes, already facing drug charges in New York and the subject of a series of charges in L.A. County, was taken into custody for her own safety under California's Welfare and Institutions Code, known as a 5150 hold, after the incident, Sheriff's Capt. Don Aguilar said.

Under the law, she can be held for 72 hours. But sources familiar with the incident say the actress may be held another 14 days if she is determined to be a danger to herself or others.

Her parents, who for more than a year have expressed concerns about her welfare, have discussed seeking a conservatorship for their daughter, according to a source familiar with the actress but not authorized to discuss the matter publically.

Britney Spears parents' obtained a conservatorship after a series of erratic incidents in 2008, including a much-publicized visit to a salon where she had her head shaved. In Spears' case, her father has overseen her life with a court-ordered attorney since she was deemed legally incompetent.

Under a conservatorship, a person turns over the most basic decisions in life about money, doctors and even where they live.

In Bynes' latest entanglement, a witness who called 911 reported seeing Bynes with a small gas can and was concerned it could explode.

Andrew Liverpool told reporters he saw "this girl lying down here with her left pant leg on fire and there is this gas can right here and it is trailing fire."

Liverpool said when he went to help, she had already managed to snuff out the flames on her pant leg.

The witness said Bynes was with a small dog and that when the man asked if she was OK, she said she was fine.

As he was moving the gas can away and others arrived to help, he said, Bynes left the scene and he found her on the next block. He said she then tried to leave in a cab, but he told the driver not to take her.

"When I look at her," he said, he realized "it is Amanda Bynes." He said Bynes claimed that her dog had been burned.

Deputies responded to a home in the 200 block of Avenida de los Arboles about 8:46 p.m.

"There was a call about a small fire that she'd apparently set in front of the residence, kind of out on a sidewalk on the concrete," Sgt. Eric Buschow said. "It wasn't an attempt to burn down the house or anything."

Buschow said the fire caused no property damage.

In May, Manhattan prosecutors charged Bynes with attempted evidence-tampering, reckless endangerment and marijuana possession after New York police alleged she tossed a bong out of her apartment window.

Her attorney in Los Angeles, Richard Hutton, said afterward that his client was "fine" and recent reports were "exaggerated."

In the recent New York case, an employee at the 47th Street high-rise where Bynes lives reported to police that Bynes was smoking marijuana in the building's lobby, acting erratically and supposedly talking to herself, according to authorities.

Bynes has denied using drugs and said the alleged bong was actually a plant vase.

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