Reno, Nevada - Jeremy Renner thanked fans for their "kind words" in a social media post from his hospital bed, two days after he was seriously injured in an accident near his home.

The 51-year-old Marvel star said he was "too messed up to type" as he shared a picture on his official Instagram page.

"Thank you all for your kind words. I’m too messed up now to type. But I send love to you all," he wrote.

Renner was airlifted to hospital on Sunday after suffering "blunt chest trauma and orthopedic injuries" in an accident near the Mount Rose Highway, which links Lake Tahoe and south Reno, straddling the Nevada-California border.

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At a press conference on Tuesday, Washoe County Sheriff Darin Balaam said Renner was helping a family member, whose vehicle had become stuck in heavy snow, when the incident occurred.

"Based on our investigation, Mr Renner’s personal vehicle, which was being driven by a family member, had become stuck in the snow near his home," Balaam told the news conference.

"Mr Renner went to retrieve his… SnowCat, an extremely large piece of snow removal equipment, weighing at least 14,330 pounds, in an effort to get his vehicle moving."

Sheriff Balaam said that after successfully freeing his vehicle, Renner had got out to speak with the family member when the SnowCat had begun to roll.

The star had attempted to get back into the machine, at which point he was run over, he added.

There was no indication of "foul play" in what appeared to be just a "tragic accident."

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In a previous statement, Renner’s publicist said: "Jeremy’s family would like to express their gratitude to the incredible doctors and nurses looking after him, Truckee Meadows Fire and Rescue, Washoe County Sheriff, Reno City Mayor Hillary Schieve, and the Carano and Murdock families."

"They are also tremendously overwhelmed and appreciative of the outpouring of love and support from his fans."

The two-time Oscar nominee is well-known for playing Hawkeye in the Marvel Cinematic Universe, and season two of his Paramount+ show Mayor of Kingstown premieres on January 15.