BOSTON — A man from India stabbed two teenagers with a fork, slapped a female passenger and a crew member and mimicked shooting himself during an international flight, authorities said.

The Lufthansa flight from Chicago to Frankfurt, Germany, on Saturday was diverted to Boston, where the Praneeth Kumar Usiripalli, 28, was arrested and charged with one count of assault with a dangerous weapon.

According to the U.S. Attorney’s Office, a 17-year-old passenger awoke to find Usiripalli standing over him. Usiripalli stabbed at the teen’s clavicle with a fork and then stabbed another 17-year-old boy in the head, causing a laceration, prosecutors allege. The first teen, who wasn’t injured because he was wearing a thick sweatshirt, told investigators he had exchanged pleasantries with the man sea

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