Boston Police are investigating why a woman fell to her death down a shaft in a Summer Street building tonight.

The Boston Fire Department, which initially responded to a call for a person down a shaft at 281 Summer St., said their search was at first hampered because the roof was dark and the building has more than one shaft. After more than an hour searching - and breaking down walls to several shafts - rescuers found her body at the bottom of a shaft on the third floor, the department says. The building is eight stories tall on one side; seven on another.

She was declared dead at the scene. The medical examiner's office will conduct an autopsy.

The MBTA announces that all subway trains will pull into stations and stand by at 8:46 for a 9/11 moment of silence.

Adam Weiss reports a T worker at State Street ordered him to put away his camera "because of 9/11."

Weiss adds it was one of the orange vests, not a T cop, and that he would have tried to explain the T's photo policy, but his train was pulling in.

Boston Police report arresting Javann Hall, 26, for the Thursday shooting that sent one man to the hospital in critical condition.

Hall will be arraigned Monday in West Roxbury District Court on assault with intent to murder, assault and battery by means of a dangerous weapon and unlawful possession of a firearm, police say.

Innocent, etc.