Ian McEwan and Zadie Smith among hundreds of cultural figures denouncing Gaza 'genocide'

Hundreds of writers and cultural organisations have signed a letter calling Israel's war on Gaza genocidal and urging an immediate ceasefire.

The letter's 380 signatories include writers Ian McEwan, Zadie Smith, Frank Cottrell-Boyce, William Dalrymple, Elif Shafak, Irvine Welsh and Kate Moss.

"The use of the words ‘genocide’ or ‘acts of genocide’ to describe what is happening in Gaza is no longer debated by international legal experts or human rights organizations," the letter reads, adding that the UN Human Rights Council has "clearly identified" acts of genocide enacted by the Israeli military.

The letter was organised by writers Horatio Clare, Kapka Kassabova and Monique Roffey.

The signatories say: "This is not only about our common humanity and all human rights; this is about our moral fitness as the writers of our time, which diminishes with every day we refuse to speak out and denounce this crime."

Read more: Ian McEwan and Zadie Smith among hundreds of cultural figures denouncing Gaza 'genocide'