Health officials of Mexico said that two people, aged 19 and 21 years, has died due to an outbreak of swine flu in the capital.
The health secretary of Mexico's Federal District, Armando Ahued, said there were 138 confirmed cases of the flu, including 110 cases of A(H1N1), a novel strain of the swine flu that was first detected in 2009.
Nationwide, 333 cases of the virus have been confirmed, the federal government's health secretary said earlier in the week, without saying how many deaths had been attributed to it.
"The tendency toward an increase in flu cases is normal because January is the month with the lowest temperatures," said Ahued adding that the incidence of flu should begin to subside in February.
The first outbreak of the A(H1N1) virus occurred in April, 2009 in Mexico and the United States, and quickly became a global pandemic that claimed the lives of 17,000 people. In Mexico alone, more than 1,250 people died.
The World Health Organization declared the pandemic over in 2010 as the flu returned to typical seasonal patterns.