A woman has been seriously injured falling from her horse after yobs pelted them both with stones.
The 28-year-old, from Thurcroft, Rotherham, was riding along a track in Wickersley when the stones were thrown at her horse - causing it to rear up.
Police said a group of three of four youths was responsible for the attack.
Yesterday the woman’s condition was described be medics as ‘critical’.
She had been taken to hospital with serious injuries and allowed home two days later - but was re-admitted the following day after complaining of headaches, and underwent surgery.
Detective Inspector Steve Ashmore, of South Yorkshire Police, said: “We are urging anyone who might have seen what happened or who has any information about the incident to come forward.
“We’re also interested in hearing from anyone who has suffered similar problems in the area, and will be visiting local stables.
“This shows the serious consequences of anti-social behaviour.”
The woman was riding on a track near Duke of Norfolk Lane when she came under attack at around 5.45pm on Saturday, May 17.
Officers have carried out inquiries in the Wickersley area in a bid to trace the youths, including a search on the day of the incident, but have so far been unable to find those involved.
They are now appealing for witnesses or anyone with information about the attack to come forward.
Call South Yorkshire Police on 101 and quote incident 1,204 of May 17.