Metra said inbound and outbound UP-NW train movement near Arlington Heights was halted. Around 8 a.m., Metra said Train #634 and #638 will be the next trains making scheduled stops to Chicago.
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Extensive delays are expected.
Arlington Heights police said on Twitter to avoid a railroad crossing at Ridge and Northwest Highway. Ridge is closed at the tracks while Northwest Highway remains open.
Further details were not immediately available.