Officials across the United States are stepping up alerts after the U.S. blasted Iranian nuclear facility.
There are no specific threats, but in recent days, the FBI and the Department of Homeland Security (DHS) have spoken with governors and law enforcement agencies across the country to improve the threat environment.
Sources told BBC’s U.S. partner CBS that the FBI has also changed the help of some immigration-related cases, which have been helping with immigration-related cases.
In two days of the Iran strike, U.S. immigration officials arrested 11 Iranian citizens in the United States, including those allegedly linked to Iranian military and paramilitary agent groups.
Authorities have not recommended that any arrested persons be involved or related to specific plots in the United States, and the Department of Homeland Security said there is currently no reliable threat to U.S. land.
The Immigration and Customs Enforcement Bureau (ICE) told the BBC’s news partner CBS that the arrests are part of President Donald Trump’s efforts to illegally deport immigrants.
According to the ICE, a person arrested in Minnesota, a former member of the Islamic Revolutionary Guard, “adopted contact with Hezbollah.”
Another man arrested in Mississippi has lived in the United States for eight years and is allegedly designated as a known or suspected terrorist in the United States. Another man allegedly arrested in Alabama served as a sniper in the Iranian army for three years before moving to the United States in 2024.
The arrest comes after receiving calls after contacting state leaders and hundreds of law enforcement agencies over the weekend, according to U.S. media.
Republican lawmakers and Trump administration officials have frequently spoken about the threat of Iran’s “sleeping cells” in recent days, which have infiltrated the United States under the Biden administration.
Although Iran has not posed a direct or public threat to attack the U.S. home country – there is currently an actual ceasefire in the conflict between Iran and Israel – the country has a long history of sponsoring violent attacks in the U.S. said Dr. Lorenzo Vidino of George Washington University in the U.S. said.
In 1980, shortly after the Islamic Revolution in Iran, Iranian dissidents were assassinated in Maryland, USA. Recently, the United States said that Iran plans to assassinate U.S. officials. Including Trump And his Former National Security Advisor John Bolton.
According to Dr. Vidino, dozens of people with Iran-related links have been arrested in recent years, although many of them are due to sanctions. He cites a man who sold limited night vision goggles to Iran, but it is unclear whether an individual has an ideological connection to Iran or a businessman who is just seeking profit.
He suspected that the recently arrested man was watched by the United States for some time. However, in view of the recent outbreak of violence between the United States and Iran, agents decided to rush to detain them.
In the past, other Iranians in the United States were arrested while searching for potential targets.
In another announcement, the National Terrorism Advisory System warned that “the threat environment in the United States is enhanced.”
Although no specific threat is mentioned, it is particularly wary of “low-level cyber attacks on American networks.”
Discussions on national security between federal and local officials have been widespread since the September 11, 2001 terrorist attack on the United States.
Terror incidents, mass shootings or attacks on the part of the population often lead to the presence and security stance of law enforcement officers.
Police patrols have increased since the United States participated in Iran, including buildings with connections to the U.S. or Israeli government, or buildings with Judaism.
According to CBS News, some FBI personnel focused on immigration enforcement as part of Trump’s deportation targets have been brought back to focus on counter-terrorism. On Sunday, the bureau distributed a memo to the on-site office telling them to focus their resources on the terrorist threat.
The FBI has not confirmed any changes in priorities. “The FBI has not commented on specific operational adjustments or personnel decisions,” the agency said in a statement.
“However, we continuously evaluate and readjust our resources to address the most pressing threats to our national security and to ensure the safety of the American people.”

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