The 10-month-old baby held hostage in Gaza has been killed, according to Hamas, as Israel’s prime minister vowed to return to all-out war. Kfir Bibas, the youngest person to be taken hostage, died in captivity alongside his four-year-old brother Ariel and their mother Shira, Hamas said in a statement. In a video statement, Benjamin Netanyahu, the Israeli prime minister, said there had been questions over whether Israel would return to war after “this phase of returning our abductees is exhausted”. On Wednesday, Joe Biden called on Israel to show restraint. “To continue down the path of terror, violence, killing and...