GAZA  The Samouni family knew they were in danger. They had been calling the Red Cross for two days, they said, begging to be taken out of Zeitoun, a poor area in eastern Gaza City that is considered a stronghold of Hamas.

No rescuers came. Instead, Israeli soldiers entered their building late Sunday night and told them to evacuate to another building. They did. But at 6 a.m. on Monday, when a missile fired by an Israeli warplane struck the relatives’ house in which they had taken shelter, there was nowhere to run.

Eleven members of the extended Samouni family were killed and 26 wounded, according to witnesses and hospital officials, with five children age 4 and under among the dead.

Hundreds of members of the clan flooded in to Shifa Hospital, all from Zeitoun, many in shock. Masouda al-Samouni, 20, lost her mother-in-law, her husband and her 10-month-old son. She said she had been preparing food for the baby when the missile struck. “He died hungry,” she said.