There is evidence linking chronic health problems suffered by Gulf War veterans to exposure to pesticides and nerve agents, US research has found.

A third of veterans of the 1991 war experienced fatigue, muscle or joint pain, sleeping problems, rashes and breathing troubles, the research found.

A US Congress-appointed committee on Gulf War illnesses analysed more than 100 studies in the research.

It found evidence linking the problems to a particular class of chemicals.

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These were an anti-nerve gas agent given to troops, pesticides used to control sand-flies, and the nerve-gas sarin that troops may have been exposed to during the demolition of a weapons depot.

'Excess illness'

Dr Beatrice Golomb, the committee's chief scientist, said that genetic variants make some people more susceptible to such chemicals.

When exposed, these people ran a higher risk of illness, she said.

"Convergent evidence now strongly links a class of chemicals - acetyl cholinesterase inhibitors - to illness in Gulf War veterans," Dr Golomb told Reuters.

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