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A City worker was left fighting for life after being stabbed in the head by a total stranger as she walked home.

Qingqing Rao, 29, is in a critical condition in hospital after suffering serious knife wounds following the brutal attack in a park in Dagenham.

The business analyst was walking home from her job in the City on Monday February 13 when she was pounced on in Castle Green park by a complete stranger.

Detectives returned to the scene tonight to appeal for witnesses and information.

(Image: Google Maps)

Detective Chief Inspector Gary Holmes said: "Qingqing remains unconscious in hospital in a life-threatening condition.

"Her parents and husband are by her side and desperate to catch the person who did this to her.

"Officers will be returning to the area tonight in the hope someone comes forward with information that could help our investigation.

"If you know anything at all, or saw something suspicious that night, please contact us as soon as possible.

"We are still keeping an open mind about the motive and exploring all lines of enquiry but indications are Qingqing was brutally attacked by a stranger."

Qingqing was found unconscious on Kithira Road, in Dagenham, at 9.51pm on February 13.

She was rushed to hospital with multiple stab wounds including serious head injuries.

Having left her office in Liverpool Street, the last part of her journey saw her board a bus at Rippleside Cemetery, Barking, at 9.37pm, getting off three minutes later at Castle Green park by the A13.

She was walking across the park, heading for home, when she was attacked.

(Image: Getty)

Qingqing's bag was later found in Goresbrook Road, although it is not yet known if any of her property is missing.

Detectives are still appealing for two women who helped paramedics to contact them, as well as anyone else who has information about what happened.

There have been no arrests at this stage.

Chief Superintendent Sean Wilson said: "This was clearly a horrific attack that has left a young woman fighting for her life.

"Attacks like this are rare but I know our local community will be very concerned about what has happened.

"We are putting extra officers on patrol in the area to offer reassurance and giving every support to DCI Holmes' investigation.

"We do not want to alarm people but it's prudent for everyone to take sensible crime prevention precautions. Avoid secluded and poorly lit areas at night, particularly if you're alone, and do tell a friend or family member where you are going."

Anyone who can help is asked to call incident room on 020 8345 1570, contact police via 101 or by tweeting @MetCC.

To give information anonymously contact Crimestoppers on 0800 555 111 or visit crimestoppers-uk.org.