Russia said Thursday it had evidence the perpetrators of last week’s massacre at a concert hall outside Moscow were linked to “Ukrainian nationalists”, a claim that the United States called nonsense.President Vladimir Putin and his security services continue to allege Kyiv and the West were involved somehow in last Friday’s attack, despite an Islamic State affiliate having claimed responsibility.Putin said Saturday that 11 people had been detained after gunmen stormed the Crocus City Hall, setting the building alight and killing at least 143 people.!function(e,t,n){let…