Israel finds 'biggest Hamas tunnel' near border

Israeli army uncovers biggest Hamas tunnel in Gaza Strip near Erez border crossing. Tunnel part of wider network, stretches over 4 km, costs millions, took years to construct. Tunnel lead by Mohamed Yahya, brother of Hamas chief Yahya Sinwar. Tunnel features drainage systems, electricity, ventilation, sewage, communication network, and rails. Large number of weapons found in tunnel. Hamas used huge resources for tunnel to attack Israel near Erez crossing used for entry of Palestinian workers and medical travelers.