Authorities say the incident in which two pedestrians were hit by a truck at a Pride parade near Miami Saturday -- leaving one dead and the other injured -- was a "tragic accident" and not an intentional act.

The 77-year-old driver of the truck "accelerated unexpectedly" before the parade began in Wilton Manors, Fort Lauderdale Police said in a news release Sunday.

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Authorities say the incident in which two pedestrians were hit by a truck at a Pride parade near Miami Saturday -- leaving one dead and the other injured -- was a "tragic accident" and not an intentional act.