The first terrorist attack on the World Trade Center occurred on February 26 , 1993 , at 12:17 p.m. , when a Ryder truck filled with of explosives , planted by Ramzi Yousef , detonated in the underground garage of the North Tower . The blast resulted in a hole through five sublevels . The greatest damage was on levels B1 and B2 , with significant structural damage on level B3 . Six people were killed , and more than a thousand were injured , as 50,000 workers and visitors were inside the tower at the time . Many people inside the North Tower were forced to walk down darkened stairwells that had no emergency lighting , and some took two hours or more to reach safety
occurred on February 26 , 1993
1993 World Trade Center bombing
One World Trade Center