Cancellation of Russian artistic events and performances are continuing across the arts world, in response to the invasion of Ukraine.

Irish writers including Colm Tóibín, Áine Ní Ghlinn, June Considine and Lia Mills are among the signatories of a letter from PEN International, the literary organisation that promotes free expression, which condemns the invasion.

In all, over a thousand writers including Margaret Atwood, Yann Mantel, Salman Rushdie and Olga Tokarczuk signed the letter which urgently calls for "an end to the bloodshed".

The letter continues:

"We stand united in support of writers, journalists, artists, and all the people of Ukraine, who are living through their darkest hours. We stand by you and feel your pain.

"All individuals have a right to peace, free expression, and free assembly. Putin's war is an attack on democracy and freedom not just in Ukraine, but around the world."

PEN is just one of many cultural and artistic organisations that have taken a stand over the current crisis.

In Ireland, performances by Russian arts groups including the St Petersburg Ballet Theatre and the Royal Moscow Ballet have been cancelled.

Internationally the Frankfurt Book Fair, due to take place in October, has suspended cooperation with the Russian authorities organising the Russian stand at the event.

In a statement, the organisers of the fair said it strongly condemned Russia's attack on Ukraine and that it assured Ukrainian publishers of its full support.

Russia will no longer take part in Eurovision this year, while the curator and artists of the Russian Pavilion at the Venice Biennale have resigned from their positions, thereby cancelling their participation in the festival.

Meanwhile the celebrated Russian conductor Valery Gergiev, a known supporter of Vladimir Putin, has been dropped by his management company and was asked to resign from his position as honorary President of the Edinburgh International Festival.