2,500-year-old Helmet of Cotofenesti among objects taken after thieves used explosives to enter building

Dutch police have arrested three men in connection with the robbery of ancient Romanian artefacts from a museum in the north-east of the Netherlands, after an intensive four-day hunt.

The break-in on Saturday, during which the men used explosives to get into the Drents Museum in Assen, has angered Romania and prompted Dutch police to scramble to track down the culprits.