An explosive device detonated on Friday morning near the security fence in the southern Gaza Strip.
Soldiers from an IDF unit carrying out routine operational activity along the border between Israel and southern Gaza reported hearing a loud explosion.
No injuries were reported.
Soldiers returned fire with tank rounds, targeting an area in Gaza near the border used by terrorists as a lookout to track IDF movements, and which was used in this incident, an army spokesman said.
"We are checking the source of the explosion," the spokesman added.
Palestinian sources reported that IDF forces returned fire into the Strip east of Khan Younis, injuring four people.