The Israeli military said it has discovered a Hamas command tunnel running under the headquarters the main UN aid agency for Palestinians in Gaza. The tunnel was 700 metres long, 18 metres deep and served as an important facility for Hamas’ military intelligence service, the Israel Defense Forces (IDF) said on Saturday evening. The military said it found large quantities of weapons and explosives in the headquarters of the embattled UN Relief and Works Agency for Palestinian Refugees in the Near East (UNRWA) in Gaza City, in the north of the coastal strip. The IDF also said there were indicati…