A tanker crashed and exploded in Maryland on Saturday.
Icy conditions are being blamed for the deadly crash.
Two people were killed and more than a dozen others were hurt in a 55-car pileup along a Baltimore highway.
Officers say icy patches on the roads early Saturday morning caused more than 200 crashes in the city alone.
Another crash on the same road killed a third person, and created a 15-car pileup on the Baltimore beltway.
The highway had to be shut down for hours, and the state extended its travel advisory.
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