(Bloomberg) -- Export sales of American pork soared to an all-time high last week as buyers stock up in anticipation of a widening protein gap created by the spread of a pig-killing disease in Asia.

“They’re simply front-running the Chinese with everyone becoming fully aware of the demand wave about to hit,” Dennis Smith, senior account executive at Archer Financial Services, said in an email.

Livestock traders who have been waiting for months for China to start stepping up imports of U.S. meat got their first taste of the buying last week. This week’s data signals the tightening in global protein markets may be gathering pace.

Read More: U.S. Export Sales of Pork and Beef by Country (Table)

Export sales jumped to 351,000 metric tons as Mexico and China each snapped up the biggest weekly hauls in U.S. Department of Agriculture data going back to 2013 China’s weekly purchases of 152,600 tons tops the previous record of 142,200 tons from just a week ago.

The Asian country continues an aggressive meat-import program as African swine fever devastates herds. China has also pledged to boost imports of American agriculture goods such as pork and soybeans amid thawing tensions in the U.S.-China trade war. That as the world’s biggest pork producer sees domestic output plunge the most since at least 2009.

Mexico, typically the top buyer of U.S. pork, bought 132,400 tons for the week, almost double the previous record in mid 2014. Japan’s purchases also surged.

--With assistance from Lydia Mulvany.

To contact the reporters on this story: Michael Hirtzer in Chicago at mhirtzer@bloomberg.net;Dominic Carey in Washington D.C. at dcarey5@bloomberg.net

To contact the editor responsible for this story: James Attwood at jattwood3@bloomberg.net

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