Two explosions occurred near the finish line at the Boston Marathon on Monday about four hours after the start of the race.
Runners approached from the west.
The two explosions were about 550 feet apart.
The Mandarin and Lenox Hotels were evacuated because of reports of suspicious packages.
Second explosion went off about 10 seconds after the first.
First explosion occurred about 2:50 p.m. on the north side of Boylston Street, just before the finish line.
A pair of blasts at the Boston Marathon on Monday left three people dead, including a child, and at least 140 more injured.