AN AIR ambulance and a heavy police presence were spotted in a popular park.

Emergency services were called to Palmer Park Stadium on Wokingham Road in the last hour.

An eye-witness said: "The helicopter has landed at Palmer Park. There are a lot of people gathered around it and there is a police car parked next to it."

It is not yet clear what the incident is, but both South Central Ambulance Service and Thames Valley Police have been approached for comment.

More follows.