Homeland Security officials are warning Americans of heightened threats in the United States after the attacks on Iran.

The Department of Homeland Security issued an advisory on June 22 saying attacks from low-level cyber "hacktivists" are likely, and larger attacks could follow if Iranian leaders issue a religious ruling "calling for retaliatory violence against targets in the Homeland."

The agency said Iran has a longstanding commitment to strike American government officials following the killing of Iranian Gen. Qassem Soleimani in 2020, but the attacks on Iran will likely amplify that commitment.

In addition, officials said they could trigger more anti-Semitic attacks in the United States.

"Multiple recent Homeland terrorist attacks have been motivated by anti-Semitic or anti-Israel sentiment, and the ongoing Israel-Iran conflict could contribute to US-based individuals plotting additional attacks," the advisory issued at noon ET said.