According to the U.S. State Department, multiple American citizens died when a tour bus rolled over in Mexico on Tuesday this week, killing 12 and injuring 18. Spokeswoman Heather Nauert said in a statement on Twitter, "We can confirm the deaths of multiple U.S. citizens in #Mexico bus accident, and several injuries. We express our heartfelt condolences to those affected by this tragedy." Sources add that U.S.