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A woman, struck by a truck being raced by Vivint CEO Todd Pedersen that also killed her 8-year-old son as they watched SCORE International's Baja 500 event in Mexico this weekend, has been upgraded to fair condition.

Pedersen, though shaken and "devastated" by the accident Saturday, was uninjured — and Monday afternoon, company spokeswoman Liz Tanner confirmed that "authorities recognized that it was an accident and no charges were filed" against him. According to KTLA, the boy is 8-year-old Xander Hendriks.

In a statement Monday, SCORE said the child's death was one of three fatalities reported over the weekend in Mexico's rugged, off-road classic race. The child's death delayed closing time on the course by one hour and 10 minutes.

The accident occurred about a half-mile from the starting line as Pedersen's truck tried to negotiate a curve entering the Ensenada Wash. SCORE officials stressed that Pedersen was trying to avoid other spectators when his truck struck the mother, her son and another person. The condition of the third person was not available.

SCORE officials confirmed that the mother, whose identity was being withheld, was being treated at the hospital for head and leg injuries, but was expected to recover at a hospital in Ensenda, Mexico.

The race, considered one of the most brutal of its kind by off-road racers, claimed two other lives over the weekend. Pro Moto Unlimited rider Travis Livingston, 34, of Palmdale, Calif., crashed at race mile 288.9. "When SCORE medical personnel arrived, while attempting to stabilize him, Livingston went into cardiac arrest and could not be revived," the organizers' statement noted.

The second racer fatality was identified as Sportsman Moto rider Noah Evermann, 34, of Alaska. He was found dead near his motorcycle at race mile 180.9 by another race team, SCORE officials said.

"I'm devastated by the tragic accident that happened this weekend. My heart goes out to the family at this time," Pedersen said in a statement issued Sunday.

Provo-based Vivint confirmed that Pedersen had returned to the United States as of Monday, but he could not be directly reached for further comment.

— Reporter Mariah Noble contributed to this story