A man was flown to hospital by air ambulance yesterday.
Emergency services were called to playing fields in Shenley Lane, London Colney, at 3.47pm after receiving a call from a member of the public.
A man in his 30s was found injured and he was taken to hospital by air ambulance.
He is expected to make a full recovery.
Shenley Lane was closed between Napsbury Park and the A414 while paramedics and police responded to the incident.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here