The IDF has taken other precautions as well, including closure of several tourist attractions near the Gaza border, including the Black Arrow, Givat Hapaamon and Nizmit sites; and local farmers have been warned away from the vicinity of the Gaza security fence, due to fears of sniper fire or kidnapping attempts.
On Monday, the military said it deployed another Iron Dome battery elsewhere in central Israel.
On Tuesday, the military censor allowed media outlets to report that at least one battery was located in the Gush Dan region, which includes Tel Aviv and its environs.
Israel has been issuing warnings to PIJ that any attack will be met with a harsh response.
We are aware of ongoing efforts by the Palestine Islamic Jihad against Israel.
The Trump administration's worldwide negotiations representative, Jason Greenblatt, on Monday called on the terror group to tone down its war rhetoric, tweeting, "Extremist statements & provocation vs. Israel by Islamic Jihad significantly harm the people of Gaza & are very risky".
On Saturday, Maj. Gen. Yoav Mordechai, who runs the Defense Ministry's chief liaison office with the Palestinians, publicly warned Islamic Jihad in a video posted to YouTube.
The event was considered by Islamic Jihad to be "a declaration of war" by Israel, and stated "it is our right to respond to any aggression, including the right to respond to the crime of attacking the tunnel east of Dir al-Balah, where 12 Mujahideen from Al-Qassam and Saraya al-Quds fell".
More than a dozen militants were killed in the collapse and the IDF later revealed it is holding the bodies of five, likely to use as bargaining chips in negotiations over the release of Israeli captives and fallen IDF soldiers. Ten PIJ operatives, including two senior commanders, were killed during Israel's operation to destroy the tunnel.
Senior defense officials have reason to believe that Islamic Jihad is planning a revenge attack.
"I say this to every entity, rogue faction, organization - everyone".