Two people who attended the Amsterdam Dance Event have died, presumably as a result of drug use, local broadcaster AT5 reports.

A 21 year old man who was taken ill on Saturday night at the Westergasfabriek died in hospital in the early hours of Sunday. Earlier a 33 year-old Serbian man collapsed outside Club Lite on Jan van Gaalenstraat. Both are thought to have taken drugs.

The Amsterdam Dance Event, which ended on Sunday, comprised some 300 events taking place at 85 clubs throughout the city.

Amsterdam city council told RTL news it deplored the deaths. It also said Amsterdam Dance Event is subject to strict regulations concerning drug use and the presence of first aid staff. Both cases will be investigated by the public prosecutor.