TRENTON, Mich. -

Trenton police say a 47-year-old Trenton man was heading over the bridge to Grosse Ile on Tuesday when he lost control of his vehicle, struck another vehicle and slammed into the guard rail.

The man is in serious condition after striking the 69-year-old woman's car and the bridge railing. Police are not sure why he lost control but say he does have a medical condition.

The woman was treated for minor injuries and is expected to be released from the hospital shortly.

SLIDESHOW: Car teeters on Free Bridge in Grosse Ile

Published On: Feb 26 2013 11:20:45 AM EST   Updated On: Feb 26 2013 11:21:44 AM EST

A car could seen teetering on the Free Bridge in Grosse Ile Tuesday morning after slamming into the guardrail.

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The accident on the Free Bridge happened just before 10:30 a.m. Tuesday morning.