Bomb disposal experts have removed a “distraction device” discovered at a recycling centre in Greenock.
Police were called to Upper Cartsburn Street at about 11:15 on Monday and the nearby area was evacuated.
The Explosive Ordnance Disposal (EOD) team said the distraction device was designed to make a loud noise and was not a grenade as initially feared.
Inverclyde Council said the ordnance team had now left the area and the device had been safely removed.
A spokesman added: “A member of staff at the council recycling facility in Greenock discovered what appeared to be an explosive device while sorting materials.
“It was immediately moved to a secure location on the site and the building was evacuated as a precaution and emergency services notified.
“Photographs were sent to the army who advised that it appeared to be a distraction device designed to make a loud noise.”
An Army spokeswoman said: “These items are not uncommon and the best thing to do if anyone finds anything like them, is to do exactly what happened today: leave it alone, move everyone out of the way and call the police who will liaise with the EOD people.”