5:05 p.m. - The press conference scheduled for 5 p.m. has been postponed. Originally, it was supposed to be held this afternoon at one, but was pushed back.

Earlier today, there were also reports of a bomb threat at Boston's federal courthouse. Media and court staff were told to leave the scene.

2:52 p.m. - Reports from Boston Police are now saying that there has not been an arrest, but a press conference has been set for five this evening, by local and federal authorities.

Law enforcement has said they've made "substantial progress" in the case.

2:32 P.M. - We have been receiving conflicting reports as to whether or not an arrest has been made. WIBX will continue to update once confirmed information has been received.

Authorities are reporting that a suspect has now been arrested after being identified in the Monday bombing of the Boston Marathon.

CNN is reporting that video taken from a department store has resulted in a "clear identification" of the person.

There is no word on who the person is or whether or not police have him or her in custody.