A mother returned home to her luxury New York City apartment on Thursday to find two of her young children stabbed to death in the bathtub.

The family's nanny was arrested as the suspect in the killings, police said.

The mother discovered the bodies of the little boy and girl at about 5.30pm. in their apartment at 57 West 75th Street, near Central Park, on Manhattan's affluent Upper West Side, police said.

New York Police Department spokesman Paul Browne said the children suffered "multiple stab wounds", and were pronounced dead at the scene, he said.

"It's about the worst thing you can hear or imagine," Browne said.

The nanny was lying on the bathroom floor and had stabbed herself in the neck, police said.

A bloody kitchen knife lay on the floor nearby, police said.

The 50-year-old nanny, who was not identified, was taken to a nearby hospital and was under arrest, police said.

She was listed in critical but stable condition, police said.

The mother was identified as Marina Krim, 38, police said.

The slain children were Leo, 2, and Lulu, 6.

Their father is Kevin Krim, a CNBC executive.

The mother had returned home with a third child, 3-year-old Nessie, after the girl's swimming lesson, Police Commissioner Ray Kelly said at a media briefing.

She saw that the apartment was dark and returned to the lobby to ask the doorman if the nanny and kids had gone out, he said.

The doorman said no, and she returned to the apartment to make the grisly discovery, he said.

A neighbour heard the mother's screams and called 911, police said.

A neighbour quoted in The New York Times said she could hear "bloodcurdling screams" from a woman in the apartment.

She said she also could hear the building's superintendent, who had arrived on the scene, yelling: "You slit her throat! You slit her throat!"

The children's father was returning on Thursday from a business trip, police said. Police met him at the airport when he arrived and notified him of the tragedy.

Krim is a senior vice president and general manager of CNBC Digital. He moved to CNBC in March from Bloomberg LLP, where he was global head of Bloomberg Digital. A graduate of Harvard University, Krim was also a former executive at Yahoo.

Neighbours said the children's mother was a paediatrician.

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Thu May 23 06:20:32 SAST 2013 ::

Oct 26, 2012

Mrazane

Oh Nkosi yami!!!!!!!!!! This is so so so sad.

May the Lord comfort this family. Ngiphelelwe.
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Oct 26, 2012

MophemeKoPitori

Devil is prevalent in the states, I think Lady Gaga was around the vicinity
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Oct 26, 2012

NNANNAS

YOO! THE WORLD IS COMING TO THE END REALLY
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Oct 26, 2012

D-liciousLips

sad, condolences to the family
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Oct 26, 2012

vivla

Oh my word, why couldn't she take out her anger or frustration on the mother if she was upset about something. Shoooo, this is sad, i think i would die if anything would to happen to my daughter.
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Oct 26, 2012

PAPARAZ

JESUS CHRIST
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Oct 26, 2012

Galfrend

This just brings tears to my eyes :(
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Oct 26, 2012

maditaba

Its also posibble somebody stabbed the nanny and the children
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Oct 26, 2012

The-Vince

But how do they know fore sure that the old woman stabbed the kids...! this is terrible, I can only imagine her going in the house and making such a gruesome discovery, serious type of counciling will need to be done for her to come to terms with this and accept, pray that God heals her heart and mind.
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Oct 26, 2012

malemaforpresident

The 50-year-old nanny
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The mother should have just kiilled the blooody bitch once nywerenywere police police for what not with my kids
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