The JCB World Headquarters in Rocester has been hit by a tornado.
Hurricane force winds hit the side of the factory, causing the collapse of a wall and several windows to be shattered where backhoe loaders were being produced.
JCB Backhoe Assembly Manager Richard Williams said: “I was about 30 yards away at the time and I heard an enormous crash.
“I turned around and saw the wall and the windows had come out and a big whirlwind of leaves and branches blowing around outside. Luckily no-one was in the vicinity at the time.”
A JCB spokesman said: “Employees who have been here for decades said they had never seen anything like it.”
Production was suspended for 30 minutes while safety checks were carried out. Clear up operations then began and the area beyond the wall declared safe for production to continue. No-one was injured in the incident and the area has now been cordoned off.