The 17th-century paintings, a depiction of two laughing boys by Frans Hals and a forest landscape by Jacob van Ruisdael, were snatched from the Hofje van Mevrouw van Aerden museum in the central town of Leerdam in late May.

The thieves triggered a burglar alarm, but had fled the building before police arrived. A search of the area immediately after the theft turned up only the frame of one of the paintings that had been dumped in a hedge.

A new tip about the paintings’ whereabouts led to their discovery on Oct. 28, police said in a statement. A fourth suspect is on the run, police said.

Police have not estimated the value of the paintings, but called them valuable parts of the country’s “cultural heritage.”