Israeli forces have discovered a large tunnel adjacent to the Gaza border, raising questions about pre-war intelligence. The tunnel extends for over four kilometers and reaches 400 meters from the Erez crossing. The Israel Defense Forces believe the tunnel was built under the leadership of Mohammed Sinwar, the brother of Hamas leader Yahya Sinwar. This discovery comes amidst heightened tensions between Israel and Palestine following the recent conflict in October. The tunnel is one of the largest found yet in Gaza, highlighting the ongoing efforts by both sides to strengthen their military positions.