US embassy on 7 March repeatedly urged all American citizens to leave Russia immediately, giving no further details about nature of threat

The US embassy had warned Americans that “extremists” had imminent plans for an attack in Moscow weeks ahead of the deadly strike on concertgoers by Islamic State militants on Friday that resulted in the deaths of 93 people.

In the deadliest attack in Russia since the 2004 Beslan school siege, gunmen sprayed civilians with bullets just before Soviet-era rock group “Picnic” was to perform to a full house at the 6,200-seat the Crocus City Hall just west of the capital.

The US embassy on 7 March repeatedly urged all American citizens to leave Russia immediately, giving no further details about the nature of the threat, but said people should avoid concerts and crowds and be aware of their surroundings.

“The Embassy is monitoring reports that extremists have imminent plans to target large gatherings in Moscow, to include concerts, and US citizens should be advised to avoid large gatherings over the next 48 hours,” the embassy said on its website at that time.