US officials have denied a suspect is under arrest for the deadly Boston Marathon blasts, but they have identified a possible bomber from a video image.
The FBI delayed a news conference scheduled for 5pm (2100 GMT) on Wednesday amid reports of a breakthrough in the case.
No arrests had been made and the suspect in the video had not been identified by name, two US government officials said.
The federal courthouse in Boston was evacuated amid reports a suspect for Monday’s bombings at the Boston Marathon was due to appear in court, but officials said they cleared the area because of a bomb scare.
Al Jazeera’s Alan Fisher, reporting from Boston, said reports of an arrest made had been debunked by the FBI and other Boston bombings investigators.
Al Jazeera, Qatar