Moscow is “throwing everything” at Kiev for the Crocus Hall terror attack.

The Russian Investigative Committee announced Thursday that it had discovered evidence showing that the gunmen who they killed more than 140 people in the attack on a concert hall on Friday in Moscow are associated with “Ukrainian nationalists”.

In the early hours after Russia’s deadliest attack in 20 years, Moscow appeared to be seeking to link the attack to Ukraine, even though Kiev strongly denied any involvement and the Islamic State group claimed responsibility.

In the announcement, the State Commission states for the first time that he discovered evidence of a Ukrainian connection. Although he described the nature of the alleged evidence, he did not make it public.

“As a result of cooperation with detained terrorists, the study of technical devices seized from them and the analysis of information on financial transactions, evidence was obtained of their connection with Ukrainian nationalists,” the statement emphasizes.

According to the Russian Investigative Committee, the perpetrators received significant amounts of cash and cryptocurrencies from Ukraine and that another suspect involved in terrorist financing is in custody.

Eleven people were arrested in the first 24 hours after last Friday’s attack and eight of them, including the four alleged gunmen, have been taken into custody. Seven are from Tajikistan and the others from Kyrgyzstan.

The US had publicly warned before Friday’s gun attacks in Moscow that it had received information about a possible attack by extremists in Russia. American officials stress that they believe that the Islamic State Khorasan, an offshoot of the group in Afghanistan, is responsible for the attack.

The head of Russia’s FSB security service said earlier this week, again without providing evidence, that he believed Ukraine, along with the US and Britain, were involved in the attack.