The Singapore government said on Friday that it will be imposing visa requirements for all Mexican nationals who wish to enter the country.

Singapore's Immigration and Checkpoints Authority said the requirements will come effect from May 2, adding that this is in response to the influenza A/H1N1 outbreak in Mexico.

Singapore on Thursday upgraded the Disease Outbreak Response System Alert status from "Yellow" to "Orange," even though there are no influenza A/H1N1 cases detected in the city-state yet.

(Xinhua News Agency May 1, 2009)