Video Images Show Two Boston Bombing Suspects

Federal authorities have clear images of two separate suspects of the Boston Marathon bombings carrying black bags at each explosion site and are planning to release them today, reports the Boston Globe .

The bombing sites are located about one block apart from each other on Boylston Street.

Homeland Security Secretary Janet Napolitano testified today before a Congressional committee that some of the video collected from near the Boston Marathon finish line had raised questions.

She said there were "individuals" the FBI would like to speak to. "I wouldn't characterize them as 'suspects' under the technical term. But we need the public's help in locating these individuals," she said.

President Obama, speaking at an interfaith service in Boston Thursday, praised the city's resilience. He said, "You will run again ... We'll keep going. We will finish the race."