The Kremlin today announced it would impose sanctions against Britain, after London this week announced Moscow sanctions.

"We're sorry to have such unfriendly measures," Dmitry Peskov, the Kremlin spokesman, said, adding that "the principle of reciprocity will apply."

The announcement came after British Foreign Minister Dominic Raab on July 6 announced the sanctions against 25 Russian citizens alleged to be involved in the death of lawyer Sergei Magnitsky.

The list of 25 people punished by Britain included Alexander Bastryki, head of the Russian Investigation Commission, which reported directly to President Vladimir Putin.

London has accused Russia of "destabilizing" acts like the poisoning of former double agent Sergei Skripal and his daughter.

Skripal, 66, former Russian spy, served in the GRU.