Hamas is regrouping through “excavating tunnels of all kinds, production of missiles, explosives, and bombs, or through field training and Ribat”
Donia Al-Watan (independent Palestinian news agency) - Sept. 28, 2015

 
Headline: “The Martyrdom of an Al-Qassam activist in a resistance tunnel collapse in Gaza”
       “Today, Monday [Sept. 28, 2015] morning, [Izz A-Din] Al-Qassam [Brigades (Hamas)] activist Majed Al-Sakani died as a Martyr (Shahid) in a resistance tunnel collapse in the Shuja'iyya neighborhood of Gaza city… In a short announcement, the Brigades stated that Al-Sakani died as a Martyr while working in one of the resistance tunnels. It should be noted that the resistance is carrying out extensive preparations, whether by excavating tunnels of all kinds, production of missiles, explosives, and bombs, or through field training and Ribat (i.e., religious conflict/war over land claimed to be Islamic) in border areas.”