Source of Michigan gasoline leak still not known

The company that owns a pipeline that's leaking gasoline in Michigan is still searching for the source of the leak.   

Ingham County Emergency officials said in a statement Saturday that Wolverine Pipeline Company crews hope to find the leak within the next 24 hours and repair it. The Portage, Michigan-based company has contained the leak near a farm and a large gasoline storage tank facility about 55 miles west of Detroit.   

Some of the gas flowed about a mile down an open drain by the time the leak was reported Wednesday by a farmer. 

Crews continued digging temporary ditches Saturday near the storage tank to keep it out of the drain.   

Wolverine Pipeline says tests on wells in the area show that they pose no threat to human health.