CHICAGO (CBS) — A nasty rollover accident left one person hurt on North Lake Shore Drive overnight.

Late Thursday night, a sport-utility vehicle hit a wall on the Outer Drive, rolled over the median, and came down on its roof on the Inner Drive near North Avenue.

The car took out part of a tree and part of a fence.

Five people were inside the SUV. One was reported in serious condition at Northwestern Memorial Hospital.

Police say they do not know what made the driver lose control.

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