— Police and reporters converged on the federal courthouse in Boston on Wednesday amid conflicting reports of whether a suspect was in custody in the marathon bombings that killed three people and wounded more than 170.
Several media outlets reported earlier in the day that a suspect had been identified from surveillance video taken at a Lord & Taylor store between the sites of the two bomb blasts.
A law enforcement official briefed on the investigation told The Associated Press that a suspect was in custody. The official, who was not authorized to divulge details of the investigation, said the suspect was expected in federal court.
But FBI and the U.S. attorney's office in Boston said no arrests had been made.
"Contrary to widespread reporting, there have been no arrests made in connection with the Boston Marathon attack," the FBI said in a statement. "Over the past day and a half, there have been a number of press reports based on information from unofficial sources that has been inaccurate. Since these stories often have unintended consequences, we ask the media, particularly at this early stage of the investigation, to exercise caution and attempt to verify information through appropriate official channels before reporting."
The official who spoke to the AP did so on condition of anonymity and stood by the information even after it was disputed. A news briefing was scheduled later Wednesday.
Law enforcement agencies had earlier pleaded for the public to come forward with photos, videos or any information that might help them solve the twin bombings. Police also gathered surveillance video from businesses around the finish line.
The bombs were made from ordinary kitchen pressure cookers packed with explosives, nails and ball bearings to inflict maximum carnage, investigators and others close to the case said. But the FBI said nobody had claimed responsibility.