Who could it be?
Ukraine’s President Volodymyr Zelensky has denied his country carried out an alleged drone attack on the Kremlin, which Russia says was an attempt on President Vladimir Putin’s life.
“We don’t attack Putin or Moscow. We fight on on our territory. We are defending our villages and cities,” he said, speaking on a visit to Finland.
The Russian president’s office said defences downed two drones overnight.
It threatened to retaliate when and where it considered necessary.