Security forces went on high alert over the weekend after a full closure was placed on the West Bank and the Gaza Strip Friday to prevent the infiltration of terrorists.
The closure is scheduled to remain in effect until the conclusion of the Yom Kippur fast on Monday evening.
Meanwhile, two people were lightly wounded Saturday when a Kassam rocket scored a direct hit on a home in Sderot.
On Friday, the IDF killed two Palestinians in Beit Hanun in the northern Gaza Strip. The army said they had come to the area to collect Kassam rocket launchers used earlier in the week.
Palestinian Authority security officials said, however, that the two were killed by an air strike while traveling in a car.
Later Friday, the IAF attacked a building in the southern Gaza Strip town of Khan Yunis that the army said was used to store weapons.
The IDF said the structure's owner, a senior member of Hamas's military wing, received a call 15 minutes ahead of the missile strike telling him to evacuate the building. No one was injured.
Meanwhile, Egyptian authorities arrested four Egyptian policemen, five Palestinians and a local Beduin El-Arish in the northern Sinai for trying to smuggle ammunition and hand grenades into the Gaza Strip.
The policemen were handing over weapons to the Palestinians when they were arrested, security officials said.
The ammunition had been stolen from Egyptian stockpiles, while the grenades were provided by local Beduin, the officials said. The plan was to smuggle the weapons into Gaza through tunnels or through the Rafah border crossing, the officials said.
Four fugitives - three Hamas operatives and one Islamic Jihad member - were arrested overnight Friday in the West Bank.
Defense Minister Amir Peretz told The Jerusalem Post last week that while the security establishment hoped the IDF operations in the Gaza Strip would curb the Kassam attacks, if they didn't, he would consider a large-scale offensive deep into Palestinian territory.
"We intend to stop the Kassams at any price," Peretz said. "Hamas knows that they will pay a heavy price for every Kassam fired at Israel and if they don't stop them, they know we will consider harsher and deeper operations into Gaza."
Also Friday, the IDF and Palestinian gunmen exchanged fire in Hebron, Ramallah and Nablus.
In Ramallah, shots were fired at troops, while in Nablus, soldiers were targeted by several bombs and gunshots. No one was wounded in either incident.
In Hebron, IDF troops wounded a Palestinian man who was aiming a weapon at the soldiers.
AP contributed to the report.