The Islamic Jihad vowed to respond with counter-attack after Israel demolished the tunnel in October, killing 12 militants.
"Let it be clear: Any attack by Islamic Jihad will be met with a harsh and determined Israeli response".
The demolition killed 14 fighters from al-Quds Brigades, which is the military wing of the Islamic Jihad movement, and the Ezzedeen al-Qassam Brigades, the military wing of the Hamas resistance movement.
Major General Yoav Mordechai, Coordinator of Government Activities in the Territories (COGAT), issued a warning Saturday night in Arabic in a Youtube video to terrorist groups in Gaza and Damascus that Israel will respond to any act of terror.
These new threats come as calm prevails in the Gaza Strip due to the role assumed by Egypt in preventing the deterioration of the situation for the sake of the success of the Palestinian reconciliation.
Israel's Shin Bet security agency stated that PIJ commander Tariq Qa'adan was apprehended by the IDF in the Palestinian town of Arrabeh, southwest of Jenin, "for being a member of a terrorist group".
On Sunday, the group said that Israel's threats against its leaders amount to "an act of war".
Meanwhile, the head of the Energy Authority, Zafer Melhem, said that work is underway to rehabilitate of electricity network in the Gaza Strip and the minute the plan is ready, it will be presented to the Council of Ministers for approval and then to securing funding for it from the donors.
The Israeli regime denies about 1.8 million people in Gaza their basic rights, such as freedom of movement, jobs with proper wages as well as adequate healthcare and education.