The stabbing took place on a busy London high street.
UPDATE: The London Evening Standard have been told that the three attackers were “chanting the Koran”.
Karrien Stevens, who runs the nursery that the attack victim works at, has said: “A staff member was coming to work when three Asian girls came up behind her chanting the Koran.
“They pulled her to the ground, kicking and punching her. One of them got the knife out and cut her arm. They were shouting about Allah, that and the Koran.”
A spokeswoman for the nursery told Westmonster: “I think this was someone feeding off the recent terror attacks. The fact she had a knife and was chanting Allah says it all, really.
“One woman was carrying a Stanley knife. Whether she was radical or not I don’t know.”
Schools are in lockdown after the attack, which allegedly took place on Wanstead High Street, north London, as the woman made her way to Little Diamonds day nursery.
Her boss, Karrien Stevens confirmed the incident took place at around 9.30am this morning, adding: “It’s terrible, I’m absolutely horrified.”
She said: “Three Asian girls came up behind her chanting the Quran.
“They pulled her to the ground, kicking and punching her.
“One of them got the knife out and cut her arm.
“They were shouting about Allah, that and the Koran.”
The Met told Westmonster the incident was not being treated as terror and, when asked why, a spokesperson said: “We can’t go into that level of detail.”
Another Met spokesperson added: “She has been taken to an east London hospital as a precaution. The suspects fled the scene prior to police arrival in an unknown direction.
“No arrests have been made. Enquiries continue.
“The Met’s Counter Terrorism Command has been made aware of the incident but is not investigating at this time.”