An 80-year-old man was arrested at the Benson Boone concert at TD Garden in Boston Tuesday night after police said he threatened two girls and then looked at sexually explicit material on his phone in front of them.

It happened during the Boston leg of Boone's "American Heart World Tour."

Girls threatened at concert

One of the girls told police she and her friend were cheering for Boone when a man sitting in front of them, identified as Alan Musson of Brookline, turned around and yelled at them. She said shortly afterward, they were cheering again and Musson turned around said, "I will kill you" to them.

A short time later, Boston police said Musson was allegedly looking at sexually explicit photos on his phone and the girls behind him could see it. One of the girls told police she bel

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