Police in Lincolnshire are searching for a pair of memorials taken from a former RAF base.
It's thought thieves took the bronze plaques from RAF Wickenby to sell for scrap. Police are investigating.
They were fitted to a stone monument at the entrance to the old airfield.
The memorials remember more than 1,000 people who were killed in the Second World War.
The former RAF base is now a museum, and staff and volunteers say they are shocked and angry.
Photos courtesy of Wickenby Museum and Macks Aviation.