South Korean protestors opposed to free trade with the US clashed with police on Tuesday near a seaside hotel, where negotiators were working to get slow-moving talks back on track.

The brief pitched battle came as about one-thousand demonstrators, mostly farmers and laborers, tried to approach the negotiating venue but were pushed back by police.

The protest follows a smaller clash on Monday.

South Korean and US delegations are holding their fourth round of talks since June aimed at knocking down tariffs and opening markets between the two countries.

South Korean rice and beef farmers have especially opposed the deal, saying cheaper US products would jeopardize their livelihoods.

The two sides say they want to reach a basic deal to submit to their legislatures by the end of this year, though the chief US negotiator says the talks may drag into early next year.