A teenage girl yesterday admitted attacking an off-duty police officer who was found bitten and stabbed.

The 14-year-old pleaded guilty to assaulting the 38-year-old man, found stabbed in the arm and with human bite marks on his body at Wanstead Flats in the afternoon of September 15.

Yesterday, three teenagers entered their pleas at Redbridge Youth Court in Barkingside.

The 14-year-old girl pleaded guilty to assaulting the man, and a 13-year-old boy pleaded guilty to possessing a kitchen knife.

The third teenager, a 15-year-old girl, denied intent to cause grievous bodily harm and unlawfully wounding, and being in possession of a knife.

But she admitted to being in possession of cannabis.

The off-duty police officer was allegedly attacked after he intervened when he saw them trying to start a fire on one of the football pitches.

However, the three teenagers all denied charges of arson.

All three, who cannot be named for legal reasons, were bailed and will stand trial at Romford Magistrates Court on May 12.