Travellers should be vigilant whilst in Amsterdam

Seven people have been arrested in the Netherlands on suspicion of planning to blow up shops in Amsterdam. Police acted on a tip a day earlier from an anonymous caller in Belgium who had warned of attacks intended to cause many casualties. The suspects, six men and a woman, have joint Dutch and Moroccan citizenship. Earlier on Thursday, the authorities closed a major shopping street in Amsterdam. A concert by the American band The Killers was also cancelled. The caller had warned of "an action with the aim of claiming casualties in busy places". Authorities ordered the closure of dozens of shops, including an outlet of Ikea.