A construction worker sustained serious injuries Monday after he was struck by a Bobcat excavator while working at a home in Malverne, Nassau County police said.

The 69-year-old victim was hit by the excavator as it was being operated by a 29-year-old man. The victim, who was not identified, was transported by a Nassau police helicopter to a hospital for treatment, according to police. He was in critical condition Monday night.

The investigation is ongoing, police said.

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LI impact of child care funding freeze ... LI Volunteers: America's Vetdogs ... Learning to fly the trapeze ... Get the latest news and more great videos at NewsdayTV

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