June 8 (UPI) -- The Israeli military on Sunday released video it said showed the underground rooms where they found the body of Hamas leader Mohammed Sinwar who is believed to have died in tunnels under a Gaza hospital last month. The announcement comes more than three weeks after the Israel Defense Forces launched an airstrike on a bunker near Gaza European Hospital in Khan Yunis, killing more than two dozen people. The IDF said Sinwar was among the dead and initially announced his body had