Russia-Ukraine updates: Putin suspends key US-Russia nuclear treaty in speech denouncing West

Russia claims that its withdrawal from the U.N.-brokered grain deal was a response to a drone attack Saturday in the waters of the Sevastopol Bay, in the Black Sea near Crimea.

"The Ukrainian armed forces, under the cover of a humanitarian corridor created as part of the implementation of the 'Black Sea Initiative' to export Ukrainian agricultural products, launched massive air and sea strikes using unmanned aerial vehicles against the ships and infrastructure of the Russian Black Sea Fleet at the naval base in Sevastopol," the Russian Foreign Ministry said in a statement.

Russia claimed the drones did not cause serious damage to infrastructure and that the Black Sea Fleet destroyed all the drones.

Russia accused British specialists of being involved in preparing the attack and training the Ukrainian military in the city of Ochakov.

"According to available information, representatives of this unit of the British Navy took part in the planning, support and implementation of a terrorist act in the Baltic Sea on September 26 this year to undermine the Nord Stream 1 and Nord Stream 2 gas pipelines," the Russian military claimed.

-ABC News' Natalia Shumskaia and Anastasia Bagaeva

Russia accused the British army of carrying out a "terrorist act" in the Baltic Sea to undermine the Nord Stream 1 and Nord Stream 2 gas pipelines on Sept. 26.

"According to available information, representatives of this unit of the British Navy took part in the planning, provision and implementation of a terrorist act in the Baltic Sea on September 26 this year to undermine the Nord Stream-1 and Nord Stream-2 gas pipelines," the Ministry of Defense said in a statement.

The British Ministry of Defense denied the accusation calling it an "invented story."

"To detract from their disastrous handling of the illegal invasion of Ukraine, the Russian Ministry of Defence is resorting to peddling false claims of an epic scale. This invented story, says more about arguments going on inside the Russian Government than it does about the west," the British Ministry of Defense said in a statement on Twitter.

-ABC News' Rashid Haddou-Riffi

The Russian Defense Ministry announced that Russia is suspending its participation in the execution of agreements on the export of grain from Ukrainian ports, according to Russian news agency Interfax.

"The Russian side suspends participation in the implementation of agreements on the export of agricultural products from Ukrainian ports," the Russian Defense Ministry said on Saturday.

The decision was made "taking into account the terrorist act carried out on October 29 this year by the Kyiv regime with the participation of British specialists against ships of the Black Sea Fleet and civilian vessels involved in ensuring the security of the" grain corridor ."

-ABC News' Anastasia Bagaeva

The U.S. has officially announced another $275 million aid package for Ukraine, Secretary of State Antony Blinken announced Friday.

The aid includes “additional arms, munitions, and equipment from U.S. Department of Defense inventories.”

Since the start of the conflict, the administration has provided $18.5 billion in assistance to Ukraine.

-ABC News' Shannon Crawford