Residents were told to close their windows and stay indoors after a gas leak at a food factory yesterday.
The warning came as the Kettleby Foods factory, in Leicester Road, near Melton, was evacuated when a pipe carrying ammonia ruptured.
Police closed the A607 Melton to Leicester road at 3.10pm after staff at the factory, in Samworth Way, raised the alarm at 3pm.
A 30m protection zone was established while two firefighters wearing breathing apparatus turned off the external valve on the fractured pipe. The firefighters worked with specialist -site engineers to try to stop the leak. As the Mercury went to press, safety teams were still working on this.
The A607 was reopened at 5.10pm.
Nobody was hurt in the incident.