Heightened vigilance has swept the United States amid escalating concerns of terrorist threats posed by Iranian nationals, following the U.S.'s recent bombing of nuclear sites in Iran.

In the wake of military action, several arrests within the U.S. underscore fears of sleeper cells and potential domestic security threats, as Fox News reports.

Americans have been strongly urged to remain alert after the U.S. conducted bombing raids on Iranian nuclear facilities over the weekend. These military actions have intensified fears of retaliatory attacks on U.S. soil.

Officials sound alarm

A significant development in the aftermath includes the arrests of over a dozen Iranian nationals within the United States.

Those apprehended are associated with serious crimes such as domestic assault, drug offenses, and weapons possession. This raises concerns over potential links to terrorist activities.

Among those arrested was an individual with a background as a sniper in the Iranian army, having served until just four years ago. This revelation has amplified the fears of trained military operatives potentially operating within the country.

Former Department of Homeland Security (DHS) Secretary Jeh Johnson expressed deep concerns over the presence of undocumented Iranian nationals with alleged ties to groups like Hezbollah and the Iranian Revolutionary Guard Corps (IRGC). He emphasized that this issue is a significant law enforcement concern.

Concerns over border security, domestic policies

Tom Homan, Trump administration border czar, highlighted his apprehension about Iranian sleeper cells possibly taking advantage of what he perceives as lenient border policies by the current administration.

He pointed out the complexities of identifying those who have managed to enter the country undetected.

The Department of Homeland Security issued a warning about a "heightened threat environment," largely due to the U.S.'s involvement in the ongoing Israel-Iran conflict. This suggests a possible increase in threats in response to geopolitical tensions abroad.

Tensions have been further stoked by threats broadcast on Iranian state television, targeting American citizens and military personnel stationed in the region.

These developments have been closely monitored by U.S. officials as indicators of potential escalations.

Military, intelligence resources redirected

The possibility of sleeper cells acting independently from their sponsors was underscored by former Secretary Johnson. He indicated that individuals within the U.S. associated with organizations like the IRGC or Hezbollah may choose to act independently in response to the growing friction in the Middle East.

In response to these increased threats, the FBI is reallocating its resources. This shift focuses on boosting cybersecurity and enhancing counterterrorism efforts to better respond to potential attacks.

Officials and security experts continue to advise American citizens to stay vigilant. Johnson reiterated the importance of public awareness, emphasizing that observing and reporting suspicious behavior remains a crucial aspect of maintaining public safety.

Public safety recommendations emerge

Americans are encouraged to adopt the “If you see something, say something” approach as a direct tool for enhancing public safety. This initiative aims to involve the community actively in identifying potential threats.

Amidst these developments, the government's role in ensuring safety has shifted to prevent any potential retaliatory actions. The focus remains on maintaining a balance between freedom and security within this heightened threat environment.

As tensions persist both at home and overseas, U.S officials and law enforcement agencies continue to adapt strategies to address and preemptively counter any threats that may arise from these complex international and domestic situations.