Emergency aid has been stepped up for the Tarahumara people in northern Mexico who are suffering severe food shortages amid the worst drought in decades and freezing temperatures.

The plight of the Tarahumara, known as Raramuri in their own language, came to wider attention amid false reports of suicides. Shocked by news of the community's suffering, Mexicans have been donating supplies.

The severe weather killed off much of the community's staple crops such as corn and beans, leaving the Tarahumara more dependent than ever on aid.

As well as food, the Tarahumara have been getting medical attention. But for many it means a long walk to the nearest population centre where the help is being concentrated.

The Tarahumara have long been among the most marginalised and poorest communities in Mexico. Many live in the rugged mountains of Chihuahua state.

The drought which has wiped out the Tarahumaras' food reserves has affected wide areas of Mexico. On Sunday, indigenous demonstrators and other farmers converged on Mexico City to call for more government help.

Back in Chihuahua, aid distribution is continuing but calls are growing for more long-term help to tackle endemic poverty among the Tarahumara.