A group of alleged terrorists plotting an attack on the 9 May Victory Day celebrations in Moscow have been arrested, the Russian Federal Security Service (FSB) claimed in a statement.

"We have found a large quantity of weapons, explosives and other terrorist equipment," said the FSB in the statement.

The suspects are from former Soviet republics in Central Asia, and confessed to working "on orders from their superiors located in Syria and Turkey", the statement.

The FSB has not revealed the number of suspects arrested, nor their identities.

The Victory Day celebrations celebrate the anniversary of the Soviet victory over Nazi Germany in World War II, marked by a military parade in central Moscow.