Police investigating fatal crash on IH-610, Ship Channel Bridge

Houston police are on the scene of a fatal crash that occurred just before 1 p.m. 

We're told the crash happened on IH-610 and the Ship Channel Bridge going north. 

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Houston police said the crash involved an 18-wheeler. 

All lanes going northbound have been blocked off. 

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No other details have been released as of yet. 

This is a developing story. We'll keep you up-to-date with the very latest.