The Bomb Squad are on site in Fordshill Road in Rotherwas.
West Mercia Police were called to the location after a potential suspect explosive was found.
Bomb disposal experts from Explosive Ordnance Disposal (EOD) are on scene.
Several businesses in the area have reportedly been evacuated as a precaution.
Chapel Road and Fordshill Road at Rotherwas have been closed.
More to follow.
Hereford bypass construction ‘on track’
Fury at failure to prepare for defence investment
Appeal following collision between car and pedestrian in Herefordshire
Revealed: The main roads in Herefordshire prioritised for repairs
Appeal to find missing Monmouthshire man
Man arrested in connection with stabbing incident
New Food and Drink group launched at online event