“I don’t know what happened,” he said. “I am told it was a shell that hit the house.”
“I didn’t even have the time to celebrate them,” he added.
Gaza’s Hamas-run health ministry says 115 infants have been born and then killed during the war.
According to AP news agency, the family had followed an order to evacuate Gaza City in the opening weeks of the Israel-Gaza war, seeking shelter in a central part of the strip, as the Israeli army instructed.
The BBC has asked the Israeli army for comment on the strike, and is waiting for a response.
Israel says it tries to avoid harming civilians and blames their deaths on Hamas operating in dense residential areas, including using civilian buildings as shelter.
But officials rarely comment on individual strikes.
