The Islamic State of Iraq and Syria is reportedly working with al-Qaida to carry out a terror attack on the U.S.-Mexico border in the very near future, according to a government watchdog.

Sources told Judicial Watch the Islamic State of Iraq and Syria is definitely operating along the Mexican border in Ciudad Juarez alongside al-Qaida, and one source said officials have picked up radio chatter about an imminent “attack on the border.”

“It’s coming soon,” the source told Judicial Watch.

High-level federal enforcement and other sources confirmed to Judicial Watch that a bulletin was sent out to a number of Homeland Security, Justice and Defense agencies warning that ISIS and other terrorists are operating in Juarez, where they are planning an imminent attack on the U.S. with car bombs and other vehicle born improvised explosives.

One source told Judicial Watch the commanding general at Ft. Bliss, the U.S. Army post in El Paso, is being briefed on the situation. And agents in Homeland Security, Justice and Defense agencies have been placed on high alert and told to aggressively work all possible leads and sources concerning the threat, Judicial Watch reports.

Rampant crime is bad in Juarez, and as recently as a few days ago, the U.S. issued travel warnings to anyone planning to visit.

Follow Rachel on Twitter