01/25/2012 10:49 am ET Updated Jan 25, 2012

Wiretapping Uncovered In The Mexican Congress

Mexican lawmakers said they would formally complain to the attorney general's office Tuesday after finding hidden microphones believed to have been used to spy on the lower house of Congress.

The listening devices were found "in quite a lot of offices, listening to and checking the activities of lawmakers," said Armando Rios Piter, president of the house's political coordination committee, on Televisa channel.

It was unclear who was responsible but lawmakers would release further information when possible, a statement from the lower chamber said.

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