BOMBING AT BOSTON MARATHON-GRAPHIC PHOTOS

[Duchess]

4:11 pm ET: Boston Fire Department to brief media at 4:30pm at Westin Hotel.

4:09 pm ET: Tufts Medical Center confirms that 9 victims have been taken there.

4:06 pm ET: Law enforcement authorities tell ABC News they are testing smoke and materials at scene for chemical substances.

4:05 pm ET: Boston police confirm at least 22 injured 2 dead.

4:03 pm ET: Police to search hundreds of bags left at scene by marathon participants.

4:02 pm ET: “The President has been notified of the incident in Boston,” a White House official tells ABC News. ” His administration is in contact with state and local authorities. He directed his administration to provide whatever assistance is necessary in the investigation and response.”

3:55 pm ET: Police set off controlled explosion in Boston. Third explosion hear.

3:54 pm ET: Marathon’s website tracking runners who completed the race.

3:43 pm ET: Trauma nurse tells ABC News that the race’s medical tent has become a makeshift morgue. Dealing with injuries including severed limbs and children with severe burns.

3:41 pm ET: Eyewitness Hayden Cary describes a “hectic, crazy scene.” Heard explosion go off within seconds of each other near a car, steps from finish line.