The Russian leader then said it was necessary to find out “why the terrorists after committing their crime tried to flee to Ukraine and who was waiting for them there”.
Russia has charged four men it accuses of gunning down scores of people in the country’s deadliest attack in decades.
Islamic State blazed its way back into world attention over the weekend after claiming responsibility for the horrific attack on a concert hall in Moscow.
Four men have been arrested for the attack on a suburban Moscow concert hall that has killed more than 130 people.
The attack in a Moscow concert hall had many hallmarks of an attack by Islamist militants,but one unusual aspect has intrigued security analysts.
US agencies confirmed the Islamic State group’s Afghanistan branch was responsible for the attack,which was described by Russian president Vladimir Putin as “a bloody,barbaric terrorist act”.
This week a US general warned ISIS-K “retains the capability and the will to attack US and Western interests abroad in as little as six months with little to no warning.”
The US embassy in Moscow said people should avoid concerts and crowds and be aware of their surroundings.
A judge ruled the actions of Nathaniel Veltman were a “textbook example of terrorist motive and intent”.
The move comes less than 24 hours after two bomb blasts targeted the offices of different political leaders in north-west Balochistan province.
Melissa Caddick’s collection of high-end clothes,shoes and bags by Gucci,Chanel,Alexander McQueen and others goes under the hammer this week.