KYIV – Russian President Vladimir Putin said Russian strikes on Ukrainian infrastructure and a decision to freeze participation in a Black Sea grain export program were responses to a drone attack on Moscow's fleet in Crimea that he blamed on Ukraine. Putin told reporters on Monday that Ukrainian drones had used the same marine corridors that grain ships transited under the U.N.-brokered deal. This could be due to a conflict with your ad-blocking or security software. Please add japantimes.co.jp and piano.io to your list of allowed sites. If this does not resolve the issue or you are unable to add the domains to your allowlist, please see this support page.