By Arafat Barbakh and Nidal al-Mughrabi GAZA/CAIRO (Reuters) -Palestinian civilians in the Gaza Strip sought shelter in an ever-shrinking area of the south on Sunday as Israel stepped up its bombing from air, sea and land across the enclave. Bombardments were concentrated on Khan Younis and Rafah in the south, residents said. Hospitals were struggling to cope with the flow of wounded, they said. The renewed warfare followed the collapse on Friday of a seven-day pause in the fighting between Israeli forces and Hamas militants to allow an exchange of Israeli hostages and Palestinian prisoners. I...
