Which agency should be contacted immediately if a bomb threat is detected?

The FBI should be contacted immediately if a bomb threat is detected because of their specialized role in handling terrorism-related incidents, which often includes bomb threats. They have the resources, personnel, and expertise to manage such situations effectively, ensuring public safety and thorough investigation.

While local police are typically the first responders to most emergencies, including bomb threats, it's crucial to recognize that the FBI has broader jurisdiction and capabilities when it comes to potential terrorism or interstate threats. The involvement of federal agencies like the FBI can expedite response efforts and resource mobilization when a bomb threat is suspected.

Other agencies, such as the fire department or the Department of Homeland Security, might play roles in specific scenarios related to public safety or overall national security. However, for immediate bomb threat scenarios, prompt coordination with the FBI is essential to ensure a comprehensive response and mitigation of any threats.