Romanian artefacts, including a 2,500-year-old gold helmet, were stolen from the Drents Museum in the Netherlands early on Saturday, the museum said, APA reports citing Reuters.
The Geto-Dacian artefacts belonged to the National History Museum in capital Bucharest and were on loan together with pieces from other Romanian museums as part of a touring exhibition.
Featuring 673 exhibits in all, the display was set to close on Sunday.
"This is a dark day for the Drents Museum in Assen and the National History Museum of Romania in Bucharest," Drents General Director Harry Tupan said in a statement.
"In its 170-year existence, there has never been such a major incident."
