An air ambulance helicopter has been scrambled to Daventry after a man was injured at a main electrical substation.
A team of air medics are currently treating a man in Norton Road in Daventry.
It is understood the Warwickshire and Northamptonshire Air Ambulance arrived at the scene at approximately 3.30pm.
A police spokeswoman said a man was injured at the ‘main substation’ serving Daventry.
There are no road closures in place.