Foursquare Sends E-mail Asking Users For Boston Marathon Feedback

BOSTON (CBS Boston/AP) - Social networking site Foursquare sent an e-mail to users who checked in at the Boston Marathon to rate their experience at the event.

The message - which came with the subject line "How was the 2013 Boston Marathon?" - was sent to users on Tuesday, just one day after the event was bombed.

"You were the first of your friends to check in at the 2013 Boston Marathon!" the e-mail reads."Want to let them know how it was? Write a short tip about what you liked ... and other helpful advice."

Tragedy struck the annual event when two bombs exploded about 10 seconds and 100 yards apart at about 2:50 p.m. Monday. They were detonated in Boston's Copley Square, near the finish line of the Boston Marathon.

An 8-year-old boy, a 29-year-old woman and a Boston University graduate student from China were killed, and more than 170 were injured.

The explosions occurred four hours into the race and two hours after the winners had crossed the finish line, but thousands of runners were still on the course.

(TM and © Copyright 2013 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2013 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)