FORT WORTH, Texas — A 24-year-old Fort Worth man died last month after his vape pen exploded in his face, according to the Tarrant County medical examiner’s office.

William Brown was at a vaporizer store in Keller when it happened. His grandmother, Alice Brown, said he had just purchased the device and was using it for the first time in her car.

He died at John Peter Smith Hospital two days after crawling from the car to the trunk area where he collapsed on the pavement, she said. She said she believes William Brown was attempting to get help. Alice Brown said somebody who saw her grandson called an ambulance.

The medical examiner ruled William Brown’s cause of death as penetrating trauma from an exploding vaporizer pen. His left carotid artery was severed, the report says. Alice Brown said doctors at John Peter Smith Hospital told her that William suffered a stroke inside the car and eventually had bleeding in his brain.

William Brown is at least the second person in the United States reportedly killed by an exploding e-cigarette.

In May, Florida authorities investigated the death of a 38-year-old man named Tallmadge D’Elia, who suffered multiple injuries to his face. A medical examiner’s report listed his cause of death as “projectile wound of the head.” He was also burned on about 80 percent of his body.

There have been 195 incidents of explosions and fires caused by e-cigarettes reported by U.S. media between January 2009 and December 2016, according to a report from the Federal Emergency Management Agency. Of those cases, 133 people were injured, 38 of them severely. No deaths were reported.

— Fort Worth Star-Telegram