A Battle Ground man was found guilty Tuesday of assault stemming from a July 2014 incident in which he attacked a man with a gun after they began fighting about the volume of music being played on a Columbia River beach.

Andrew J. Mortensen, 31, was convicted of two counts of second-degree assault, one of which involved the use of a firearm. He was acquitted of four other counts: second-degree assault, two counts of harassment-death threats, and tampering with a witness. One other count, harassment-death threats, was dismissed during his trial in Clark County Superior Court.

The jury heard five days of testimony and deliberated for about 2½ hours before reaching its verdict.

According to a probable cause affidavit, Vancouver police were called shortly before 1 a.m. July 6, 2014, on a report of an argument between groups on different sides of the Vancouver Lake flushing channel.

During the verbal exchange, Mortensen threatened to “come across the river with a gun and shoot” the three victims, Scott Burkett, Joshua McDonald and Bianca Lujan, Vancouver police Officer Ron Wier wrote in the affidavit.