Torture cases have increased by 500 percent in the past six years as President Felipe Calderon's administration has battled drug traffickers, human rights groups said in a report.

The report, titled "The Torture Situation in Mexico," will be presented on Tuesday to the U.N. Committee Against Torture, which oversees compliance with the Convention against Torture and Other Cruel, Inhuman or Degrading Treatment or Punishment.

Mexico signed the treaty in 1986.

"Torture continues to be a tool constantly used by the security forces," National Network of Civilian Human Rights Organizations, or Red TDT, spokeswoman Agnieszka Rzczynska said.

The report, which was prepared by the 73 human rights groups that belong to Red TDT and other organizations, expresses "concern" about a "situation aggravated by lack of progress on public policy."

The report cites National Human Rights Commission, or CNDH, figures showing a rise of more than 300 percent in torture complaint cases between 2007 and 2011, as well as cases documented by non-governmental organizations. EFE