10 years after the Boston Marathon bombings: A timeline of events

April 15 marks 10 years since bombs placed near the finish line of the 2013 Boston Marathon claimed the lives of three people.

In addition to the three people killed in the 2013 attack, 17 people lost limbs and nearly 300 others were injured when two pressure-cooker bombs exploded at the finish line, putting a violent end to that year’s race.

As many as two unexploded bombs were also found near the end of the 26.2-mile course as part of what appeared to be a well-coordinated attack, but they were safely disarmed

The fiery twin blasts took place about 10 seconds and about 100 yards apart, knocking spectators and at least one runner off their feet, shattering windows and sending dense plumes of smoke rising over the street and through the fluttering national flags lining the route. Blood stained the pavement, and huge shards were missing from window panes as high as three stories.

Here is a timeline of events of the tragic bombing:

The Associated Press contributed to this story.