The deadly A/H1N1 swine flu virus did not originate in Mexico but in Eurasia, Mexico's ambassador to China Jorge Guajardo said yesterday.

Citing the results of a study in his country, he said: "Somebody from Eurasia first got infected and took it to Mexico," causing the outbreak.

"Mexican laboratories will try their best to identify the source of the virus (within 72 hours) to find a proper treatment", he told a press conference.