COLUMBUS, GA (WTVM) - Three people are dead and at least 144 injured following back-to-back explosions at the Boston Marathon.
A senior U.S. intelligence official says two more explosive devices have been found near the scene and are being dismantled.
A third explosion had previously been reported at the JFK Library, but officials now say it was an unrelated fire incident.
More than 500,000 spectators and 26,000 runners were in attendance.
Bloody spectators had to be carried to the medical tent that had been set up to care for fatigued runners.
We spoke to a Columbus man about what he saw.
"We were sitting down, heard two explosions go off back-to-back, took us awhile to figure out what was going on...people started to panic," said Roger Hagues, who was a runner in the Boston Marathon.
Officials are not sure who may be responsible for planting the explosive devices.
Flights in and out of Boston have been delayed.
The Boston Marathon takes place every year on Patriot's Day, the third Monday of each April.
As of Monday night, the final tally is as follows:
Three fatalities have been confirmed.
Of the 144 injured, at least 17 are in critical condition, at least 25 are in serious condition and at least 8 are children.
We will continue bringing you the latest information as it becomes available.