Three people have been arrested in connection with last weekend’s gold heist at the Drents Museum in Assen.

All three were picked up in Heerhugowaard, a town in Noord Holland not far from Alkmaar, the Telegraaf reported. One of the cars used in the robbery had been stolen in Alkmaar.

The arrests were made on the basis of “the police investigation, camera images and the many tips from the public,” broadcaster NOS quoted the police as saying. The man in a photograph issued by police earlier on Wednesday is not among those who have been picked up.

The museum said on its website it was “extremely happy at the hopeful news” and said that finding back the stolen items, which are still missing, would be a “fantastic next step” for the museum and the people of Romania.

The police have not ruled out more arrests. Earlier on Wednesday, they issued several photographs of a man they want to interview in connection with the robbery.

The man, wearing glasses and a baseball cap, was seen in a DIY store in Assen on the previous Thursday, police said. Several tools and a hammer were found at the scene of the robbery, which police think may have been used to break into the building.

So far, 150 tips have come in since Tuesday night’s TV crime show appeal, during which the police appealed for information about discarded tools and items of clothing, and a hammer which was found in a nearby pond.

The heist occurred at around 3:25 a.m. on Saturday morning after an explosion shattered windows and caused damage to the museum buildings. The thieves made off with the golden helmet of Cotofenesti, crafted from almost pure gold and dating from 500 BC, along with three gold armbands.

The police are expected to issue more information about the arrests later on Wednesday evening.