NY- Yoko Ono’s chauffeur threatened her with death and attempted to extort $2 million from her on the anniversary of John Lennon’s slaying, police said yesterday.

Ono’s once-trusted driver Koral Karson, 50, [pictured left] allegedly said he would go public with photos of her wearing pajamas and tapes of her private phone calls if she refused to give him millions of dollars.

He also made bizarre comments about trying to kill her and her son, Sean Lennon, police sources said.

“She felt vulnerable. He knew that she knew what was on the tapes,” said a police source, suggesting the contents were of a personal nature.

Karson – a Turkish immigrant who once served in his homeland’s military – tormented Ono with his heartless ultimatum on Friday, the 26th anniversary of her husband’s murder at the hand of a crazed fan, police said. Cops had planned to set up a sting operation to bust Karson, but moved in more quickly after he allegedly told a co-worker on Tuesday that he had been drugging Ono.

“He told the employee that he had been injecting her with poison while she was sleeping – and that he could have killed her at any time,” a police source said.

Cops busted Karson yesterday at his Amityville, L.I., home and later removed boxes containing audiotapes and two computers from the house. The blue-eyed, silver-haired suspect denied any wrongdoing – and accused the 73-year-old avant-garde artist of sexual harassment last night as cops led him from the 20th Precinct stationhouse.

“She’s just trying to stop me from pursuing a sexual harassment case,” Karson said.

Sources said he blames his marital woes on Ono.

But Ono’s lawyer Jonas Herbs man released a statement saying the 6-foot, 180-pound Karson not only tried to extort the legendary Beatle’s widow, but “threatened physical harm.”

Karson, who earned $160,000 a year, allegedly told Ono that he had been surreptitiously recording her calls and taking secret photos of her for years.

Police sources said the recordings and a pajama photograph showed Karson had great access to her private life, but contained nothing scandalous.

“There was nothing sexual in the photo, just an intimate shot, as if to say – see, this is how close I was. A bluff for the money,” a police source said.

Karson allegedly startled Ono on Friday by shoving a two-page letter in her face, demanding, “Read this!”

As Ono began reading the letter in which Karson revealed his family problems, he snatched it from her hands and ran out of her apartment at the famed Dakota on Central Park West, the source said.

As he fled, he dropped an envelope containing a cassette recording of one of Ono’s personal phone calls and the pajama photo, the source said.

A letter allegedly written by Karson also threatened to reveal Ono’s true feelings about the U.S. and British governments and tell the public that Sean Lennon had called his father an “a—–e,” the source said.

Instead of wilting before his demands, Ono fired Karson and called her lawyer, who immediately reported the alleged shakedown to police. Karson was charged with felony attempted grand larceny.