Police were trying to determine the cause of a single-vehicle accident Saturday night that killed one person and injured another.
The vehicle left northbound Interstate 435 just south of Stadium Drive and rolled over about 7:45 p.m., police said.
The accident closed the two right lanes of I-435 near Stadium Drive.
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One lane reopened at 8:30 p.m., according to Missouri Department of Transportation officials. The other lane was expected to reopen about 9:20 p.m.
The extent of the survivor’s injuries was not known.