Detectives are appealing for information after a number of military gravestones were vandalized.
The incident happened between Monday 3 June and Tuesday 4 June at Hirst Wood burial ground in Shipley.
The gravestones had been specially provided by the Commonwealth Graves Commission in remembrance on the 75th D-Day anniversary.
Detective Inspector Amanda Middleton, said: “Our investigation is ongoing into the vandalism of these gravestones. The gravestones were destroyed in what was a mindless act of destruction and I would urge anyone with any information to come forward and speak to the police.
“High visibility reassurance patrols have been stepped up in the area whilst officers continue with their enquiries.”