BEIJING (AP) — The PowerPoint presentation wasn’t enough. The analysis by British investigators that Malaysia Airlines Flight 370 was lost at sea wasn’t enough. The relatives of Chinese passengers gathered in a hotel banquet hall on Wednesday were still skeptical — and hostile.

“It’s all lies. Not a shred of truth!” said a man who identified himself as Mr. Zhang from the Chinese city of Harbin. He said afterward that he had wanted to pummel everyone giving the presentation — a delegation of Malaysian government and airline officials.