The Kremlin has ripped up the agreement on food exports blaming Ukraine for a drone attack on the Russia fleet in occupied.

Crimea.

Claudia Redmond has this report.

Sevastopol and the latest salvo between Ukraine and Russia.

Russia says that drone attacks on the Crimean ports early on saturday were targeted against Russian vessels employed for security of ships carrying grain to countries desperate for food.

Sevastopol is strategically important to Russia.

It serves as the headquarters for Russia's Black Sea fleet and logistical hub for operations in Ukraine.

Ukraine has been swift to respond saying Russia is using the attack as a pretext to withdraw from the grain agreement.

How can Russia be among others in the G 20 if it deliberately works to create famine on several continents.

This is nonsense.

Russia has no place in the G 20.

Russia's un envoy tweeted a statement saying Russia intended to suspend participation in the grain deal.

He also alleged the attack took place with the support from the U.

K.

Something.

The UK's Ministry of Defense has denied Washington and turn had accused Russia of weaponizing food and in so doing directly impacting nations in need.

The U.

N.

Grain deal struck in july was a diplomatic coup, It allows Ukraine to reopen Ukrainian Black Sea ports for grain exports.

Already, it's allowed nearly nine million tons of Ukrainian grain to be exported and was due to be renewed in november.

Ukraine is the world's fifth largest exporter of wheat.

Many countries, from Lebanon to Ethiopia are suffering from the effects of higher grain prices as a result of the war.

If Russia does stop the grain flow, it will be a blow to these people and to resolving the Russia Ukraine crisis.

The deal had been viewed as a first step on the way to a possible cease fire.

The U.

N.

Has called for the preservation of the grain corridor, saying all parties must refrain from any action which would imperil it.

Claudia Redmond BBC News.