There were two violent incidents on the southern part of the Gaza border on Thursday morning, the IDF said.
A group of 140 Palestinians crossed into a closed military zone on the border with Israel near Erez Crossing, ignoring IDF calls to leave.
Soldiers were fired at the legs of the suspects. Palestinian medial sources claimed two people were injured by the shots.
A few hours later in the same area, shots were fired at an IDF force from within the territory.
The IDF returned fire in the general direction and no one was injured during the violence.
Last week, Israel Air Force jets struck five terror targets in the Gaza Strip after four rockets were launched toward southern Israel, activating the Code Red alert in Sderot and surrounding communities.
Israeli media reported that the projectiles had failed to reach their targets, landing in open territory near the border with Gaza.
No injuries or damage were reported on the Israeli side.
The IAF strike came after weeks of relative quite following a large-scale rocket attack on the South by Islamic Jihad terrorists in March. The Air Force struck nearly 30 Gaza targets in response to the attack.