The U.S. Defense Department said that Iran was establishing signals intelligence stations in several parts of the Middle East, including the coast of the Mediterranean Sea, the World Tribune reports.

The Pentagon’s counter-terrorist support office said the stations were established by Iran’s Islamic Revolutionary Guard Corps together with Syria.

“Two Iranian-Syrian [signals intelligence] stations funded by the IRGC reportedly have been active since 2006, one in the Al Jazirah region in northern Syria and the other on the Golan Heights,” said the report titled “Iran’s Ministry of Intelligence and Security: A Profile.”

The report, issued last month and prepared by the Library of Congress, said IRGC was planning to establish additional listening stations for northern Syria. The stations were meant to supply information on Israel to Hizbullah, Iran’s leading proxy.