Emergency services were called to the Girton Interchange at 11.30am to reports of the accident, involving a caravan and a van and two other vehicles. One person has been taken to Addenbrookes Hospital, Cambridge, as a precaution. A Cambridgeshire police spokesman said it is not believed to be a serious injury. Fire crews were in attendance and cut free a person who was trapped in a vehicle. They returned to their fire stations by 1.15pm. The A14 was closed while officers waited for recovery of the vehicles. The Highways Agency reopened the road at about 2pm but motorists are facing delays of around an hour.