The FBI is increasing its monitoring of Iran-backed operatives in the U.S. as President Donald Trump weighs involvement in the Israel-Iran conflict, a senior law enforcement source confirmed to Fox News Friday.

The White House said Thursday Trump will make a decision on U.S. involvement in the conflict within two weeks.

The monitoring reportedly includes surveillance of possible sleeper cells linked to the Tehran-backed terrorist organization Hezbollah, according to CBS News. The Lebanon-based terror group also got a clear warning from Israeli Defense Minister Israel Katz not to join the conflict.

Director Kash Patel speaks with Secretary of the Interior Doug Burgum before President Donald Trump arrives for a bill-signing ceremony in the Rose Garden of the White House in Washington, D.C., May 19, 2025. (Jim Watson/AFP via Getty Images)

While Trump has called for an “unconditional surrender,” he has yet to decide whether to involve the U.S. in the conflict. White House press secretary Karoline Leavitt told reporters Thursday he would make a decision within two weeks. Critics from both sides of the aisle have called on the president not to get involved, while others see involvement as a necessity to protect American interests.

President Donald Trump stops and talks to the media before he boards Marine One on the South Lawn at the White House June 15, 2025, in Washington, D.C. (Tasos Katopodis/Getty Images)

On Friday, a U.S. official told Fox News the USS Nimitz, which left the South China Sea Monday, would arrive in the Middle East this weekend. The USS Carl Vinson has already been deployed for some time, meaning two U.S. aircraft carriers would be in the Middle East at the same time.