A Speonk man was killed last week when his wife, driving a 2008 Hyundai, lost visibility in a street sweeper’s “cloud of dust” and hit the sweeper, Southampton Town police said Wednesday.

Grace Larson, 72, driving north Thursday on Speonk-Riverhead Road just south of Sunrise Highway in Speonk, struck the Southampton town sweeper while it was cleaning sand off the road, police said in a news release.

Her husband, Larry Larson, 72, who suffered injuries in the crash, was taken to Peconic Bay Medical Center where he was pronounced dead shortly after.

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Grace Larson was taken to Brookhaven Memorial Hospital Medical Center with minor injuries.

Unable to see the crash due to the dust, a BMW driver behind Larson drove through the crash rubble, but was uninjured, police said.