Photos from the scene of the collapse showed billowing plumes of smoke.
Firefighters stand near the collapsed part of I-95.
Office of Emergency Management via APMark Fusetti, who was driving to pick up his son at the time of the incident, said he initially thought the smoke was coming from a brush fire.
"I realized what happened when I looked in my rearview mirror," Fusetti told CNN's Jim Acosta.
"I see 95 – all of the cars stopping and then I learned, shortly after that the road had just collapsed and what was really going on."
Persons:
AP Mark Fusetti, Fusetti, CNN's Jim Acosta
Organizations:
Emergency Management, AP, CNN