U.S. confirms 22 Americans dead as families reveal details of Hamas attacks in Israel

At least 22 U.S. citizens have been killed during the Hamas attacks on Israel, National Security Council spokesperson John Kirby said at a news conference Wednesday. 

Kirby couldn't confirm details on where or how the Americans were killed, as the "individual circumstances are not exactly clear," he said. 

The attacks have claimed more than 1,200 lives in Israel. At least 1,100 have been killed in the Gaza Strip, the Gaza Ministry of Health said Wednesday.