Gov. Deval Patrick says he is looking forward to a safe Boston Marathon after an emotional week marking the anniversary of the bombing that killed three people.

Patrick made his remarks while touring the multi-agency coordination center at the Massachusetts Emergency Management Agency’s Framingham headquarters. More than 250 people from law enforcement agencies, emergency medical services, state and federal agencies, and the National Guard are monitoring the marathon from the center.

U.S. Homeland Security Secretary Jeh Johnson said officials know of no specific, credible threats to the marathon. But Johnson and others urged the public to remain vigilant.

Officials watched feeds from security cameras, television coverage and helicopters as radios crackled throughout the sprawling underground facility. Start times, street shutdowns and reports of unauthorized vehicles scrolled across large monitors.

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