The harrowing 911 calls from a Chinese birth center where five people including three infant baby girls under a month old were stabbed on Friday have emerged along with more details about the facility.

At 3.40am, someone from inside the Mei Xin Care home in Flushing called 911 to say that worker Yu Fen Wang, 52, had gone on a stabbing rampage.

She slashed three baby girls, the youngest of which is just three days old, and attacked another two adults before trying to take her own life in the basement by cutting one of her wrists.

All five victims and Wang survived and were taken to the hospital.

There were five other babies in the home at the time and a handful of mothers who had recently given birth to them.

The center is one of many other similar clandestine facilities across the country where foreign pregnant women come to give birth to their babies on US soil so that they may later gain citizenship.

One of the injured babies' mothers told the New York Post she paid $4,600 to stay there for a month.

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A woman is pictured leaving the Mei Xin Care maternity center in Queens on Friday afternoon after three baby girls and two adults were stabbed by worker Yu Fen Wang

An empty Pampers box was left discarded outside the home next to a pool of spattered blood

In the 911 call on Friday morning, one of the injured babies' mothers reported the terror as it unfolded.

'Help, help, help!' she said, according to NBC which obtained the call.

'Hurry, my baby has already been stabbed twice.'

Another person called later, saying: 'I’m sleeping … and then I heard somebody yelling … and then they are killing people.

'I just saw blood on the floor … and that somebody got hurt.'

That person told the operator they were scared to go outside in case they too were harmed.

'I'm afraid' they said. A high ranking NYPD official described it as 'illegal'.

The home is in one of a row of multi-family buildings on the quiet street in Flushing

The chaotic scene continued into the day on Friday as the investigation progressed

A crime scene unit continued to work at the scene well into the afternoon on Friday

Authorities work at the scene on Friday as the victims recover in hospital

There was a heavy police presence at the scene throughout the day on Friday

'They used it as a place for Chinese women to keep babies they gave birth to,' they said.

After attacking the five victims, Wang went to the basement of the property where she slashed her left wrist in an attempt to take her own life.

She was found there by police a short while later and was unconscious but, after receiving a tourniquet, regained consciousness.

One of the baby girls was more severely injured than the other two.

Police initially feared for her life but her condition has improved to critical but stable since she was taken o the hospital.

'There was 1 child more seriously injured than the other two, at one point we thought might have been likely but thank God she was upgraded and is now stable,' NYPD Assistant Chief Juanita Holmes said.

She added that the property was split between living quarters but that they had uncovered paperwork which showed it was a daycare center too.

There is no record for any business at that site online.

It remains unclear how many stab wounds they each suffered and where on the body they were struck.

The building where the horror unfolded is a multi-family townhouse which contains several separate apartments.

The stabbing is understood to have happened on the ground floor and in the basement.

The Office of Child and Family Services distanced itself from the facility after the stabbing and said it was not certified by them in anyway.

'OCFS is saddened by this horrific situation and investigating it as a possible illegal operation,' the agency said.