The IDF Spokesperson's Office explained the bombing of the tunnel was intended to prevent terrorists from infiltrating Israel.
The army added that Friday night's strike was a response to an attempted terror attack by Palestinians Thursday near Nahal Oz, as well as the rocket fire towards Sderot on Friday.
Palestinian sources in Gaza told AFP that the IAF had launched six raids on Gaza but that no one was hurt. They said five air strikes were carried out in the southern part of Gaza near Rafah and the border with Egypt, and the sixth east of Gaza City.
Late Thursday night a Color Red siren was sounded throughout the city of Sderot, after a Qassam rocket was launched from the northern Gaza Strip.
Security forces located the landing site of the rocket shortly after it fell. The Qassam exploded on a road in the Shaar Hanegev industrial zone, near the city of Sderot.
The force of the blast lightly damaged a nearby building, shattering its windows. A truck parked nearby was also damaged from shrapnel. No one was injured in the incident.
Earlier on Thursday evening, the IDF foiled an attempted terror attack near the Gaza border fence, close to Kibbutz Nahal Oz, as Palestinians attempted to take advantage of the heavy fog in order to plant an explosive device near the fence.
Air Force aircraft opened fire at the suspects, and seven Palestinians were reportedly injured.
The Palestinians subsequently fired several mortar shells at the area, apparently in an effort to evacuate their wounded. No injuries or damages were reported among IDF troops.