Amid the ongoing war between Israel and Hamas, the Israeli military on Sunday discovered a massive tunnel system, which it claimed is Hamas' biggest tunnel system, the construction of which was led by Mohammad Sinwar, brother of Hamas leader Yahya Sinwar. The tunnel was large enough for small vehicles to use, news agency AFP reported.

According to IDF, the tunnel has a length of over four kilometers (2.5 miles), and is located only 400 meters from the Erez Crossing. In a post on X, IDF also said that Gazans used the giant tunnel daily to enter Israel for work and medical treatment in Israeli hospitals.

"EXPOSED: The biggest Hamas terrorist tunnel discovered. This massive tunnel system branches out and spans well over four kilometres (2.5 miles). Its entrance is located only 400 meters (1,310 feet) from the Erez Crossing--used by Gazans daily to enter Israel for work and medical treatment in Israeli hospitals," read IDF's latest post on X.

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"This tunnel system was a project led by Mohammad Sinwar, the brother of Hamas leader Yahya Sinwar, and the commander of Hamas' Khan Yunis Battalion," it added.

Meanwhile, the IDF said it has carried out strikes against some 200 Hamas sites in the Gaza Strip over the past day, according to The Times of Israel.
It said that the Paratroopers Brigade raided several apartments used by Hamas in Shejaiya and found firearms, explosive devices, and other military equipment. The IDF said the troops discovered a 15-meter-long tunnel, which was later destroyed in an airstrike.

The IDF said that the Commando Brigade carried out an airstrike on Hamas weapons depot in the home of an operative in southern Gaza. The IDF noted that the depot was being used by operatives in the region to disarm, according to The Times of Israel report.

The conflict in Gaza escalated after the October 7 attack by Hamas, where about 2,500 terrorists breached the border into Israel from the Gaza Strip, leading to casualties and the seizure of hostages. Israel has characterised its Gaza offensive as targeting Hamas' infrastructure to eliminate the entire terror group while making efforts to minimize civilian casualties.