North Philly explosion caused by weather conditions

Though initial reports of an explosion at 30th and Cecil B. Moore around 5 p.m. on Friday night were unclear, authorities report that it was all just a “thermic event.”

NBC10 reports that the explosion, originally thought to have been an explosive device, was actually caused by icicles that formed as a result of the recent moisture. These icicles came in contact with high power lines from AMTRAK that run underneath the bridge and caused a blast that left a two-foot wide hole on the bridge.

According to the Associated Press, four people were treated for minor injuries.

Two of the people were hurt when flying chunks of concrete and debris hit their car as they were driving past the tracks, which serve the Northeast Corridor system connecting cities from Washington D.C. to Boston.