In an interview with BBC News, Ukip leader Nigel Farage said it was "more than likely" that it was Syrian rebels, not pro-Assad forces, responsible for chemical attacks in the country.
Asked about comments he made recently in support of Russian president Vladimir Putin, Mr Farage said:
We were about to go to war in Syria because poison gas - sarin gas - had been used, and everybody in London and Washington and Brussels assumed it had been used by Assad.
And Putin said, 'Hang on a second, don't be so sure.'
It turns out it's more than likely it was the rebels that used the gas.
If Putin hadn't intervened, we would now be at war in Syria.
United Nations human rights investigators said that evidence suggested that those responsible for March 2013 attacks in Damascus "likely had access to the chemicals weapons stockpile of the Syrian military."