Palestinians, who medics said were wounded during heavy Israeli shelling, sit at a hospital in Gaza City July 20, 2014. Israel said on Sunday it had expanded its ground offensive in Gaza and militants kept up rocket fire into the Jewish state with no sign of a diplomatic breakthrough to end the worst fighting between Israel and Hamas in two years. Gaza residents said land and naval shellings were the heaviest in 13 days of fighting. Explosions rocked the coastal enclave overnight and shells fired by Israeli naval forces lit up the sky. REUTERS/Mohammed Salem (GAZA - Tags: POLITICS CIVIL UNREST TPX IMAGES OF THE DAY)