From Boston.com this afternoon...
By Michaela Stanelun, Globe Correspondent
A teenager was struck and killed by a commuter train this afternoon behind Belmont High School, according to the MBTA and local police.
An inbound train on the Fitchburg Line hit the young woman at 12:40 p.m. Investigators on the scene described her as a girl who appeared to be high-school age, according to Joe Pesaturo, an MBTA spokesman.
It was not clear whether the young woman was a student at Belmont High School. Superintendent George Entwistle has left his office and gone to the scene, according to a secretary in the Belmont schools office.
The young woman walked onto the tracks into the path of a train that had just left Belmont Center Station, according to Deputy Chief Joseph O'Connor of the MBTA Transit Police.
"We have drawn no conclusion as to what happened in this incident or why she walked into the right of way, " O'Connor said.
The young woman was struck on a tree-lined section of the track about 250 yards from the nearest pedestrian crossing, Pesaturo said. A bike path also runs nearby. She was less than a half mile east of Belmont Station and was on the railroad's right-of-way, Pesaturo said.
Her name and exact age have not been released. Transit police and other emergency responders responded to the scene and are investigating.
There are hour-long delays on the Fitchburg commuter rail line. Buses are driving riders between the Belmont and Porter stations.
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