MEXICO CITY — A registry of death certificates in Mexico City suggests there have been 4,577 cases in which doctors mentioned coronavirus or COVID-19 as a possible or probable cause of death, more than three times the official count.

The federal government acknowledges only 1,332 confirmed deaths in Mexico City due to COVID-19 since the pandemic began.

Mexicans Against Corruption said in a report Monday it obtained access to a database of death certificates issued in Mexico City between March 18 and May 12. It showed that in explanatory notes attached to 4,577 death certificates, doctors included the words “SARS,” “COV2,” “COV,” “Covid 19,” or “new coronavirus.”

The virus’ technical name is SARS-CoV-2. The notes the group counted included terms such as “suspected,” “probable," or “possible” when describing the virus' role in the deaths. In 3,209 certificates, it was listed as a suspected contributing factor along with other causes of death, like pneumonia, respiratory failure, septic shock or multiple organ failure.

Mexico City Mayor Claudia Sheinbaum has acknowledged there are more virus-related deaths than officially reported, and has said a special commission will review the death figures. Her office did not immediately respond to requests for comment on the new report.