WARNING: GRAPHIC IMAGES BELOW

The Sudanese government has been accused of carrying out at least 30 gas attacks in Darfur which are feared to have killed hundreds of children.

Amnesty International says it has obtained video and photo evidence which shows Sudanese civilians dying in agony as they vomit blood and struggle to breathe following a spate of chemical attacks in the war-torn region.

Its report estimates that up to 250 people have died in the Jebel Marra area of Darfur since January, and that the majority of them are children.

The Telegraph attempted to reach the Sudanese government for comment at its embassy in London on Wednesday, but did not receive a response.

Darfur is in the grip of a civil war which has seen more than 300,000 people killed since the conflict began in 2003.

Omar al-Bashir, the Sudanese president, has been accused of leading a campaign of rape and mass murder against civilians in Darfur - the International Crime Court (ICC) charged him with genocide in 2008.