Letchworth woman held on suspicion of attempted murder
A 24-year-old woman has been arrested on suspicion of attempted murder and three other people are being questioned over an assault in Hertfordshire.
The incident happened in Howard Park on Norton Way South, Letchworth, on Tuesday evening.
The woman and a 51-year-old man arrested on suspicion of assisting an offender are both from Letchworth.
A man and a woman in their 20s, from the town, were arrested on suspicion of perverting the course of justice.
Det Insp Kay Lancaster said: "I am re-appealing for anyone who was in the Howard Park area around the time of the incident and saw anything suspicious to get in contact.
"Any information you can provide, no matter how insignificant it may seem could help us to solve this crime."