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Tear gas thrown in S Korea parliament as US trade deal ratified

22 November 2011 Last updated at 10:48 GMT

A politician has set off a tear-gas canister in South Korea's parliament, shortly before a free-trade deal with the US was ratified.

Politicians were seen wiping their eyes after being doused with the chemical.

Members of the ruling Grand National Party, which has a majority, convened to force the bill through in a 151-7 vote.

It follows years of wrangling over the issue. Most of the opposition abstained.

The deal is expected to increase US exports to South Korea by as much as $10bn (£6.5bn).

But South Korean farmers and some workers oppose the deal, saying it threatens their livelihoods and favours US workers.