AMSTERDAM, Reuters, AUG. 24, 2017  – Dutch police have arrested a second suspect in relation to a threat in Rotterdam where a rock concert was canceled after a tip from Spanish authorities, NOS said on Thursday.

The arrest was made earlier Thursday in the south of the Netherlands, NOS said.

Police were still questioning a Spaniard detained in Rotterdam who was driving a van containing gas canisters.

      People gather at the scene where police are investigating a van (not pictured) with Spanish licence plates containing gas bottles that was found