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Update:
The highway is reopened, Ontario 511 tweeted in an update eight hours ago.
Original story:
Highway 17 has been closed in both directions in the Heyden area due to a crash.
Details on the crash are limited at this time.
The highway was closed in both directions as of late afternoon Friday.
Heading northbound, the highway is currently closed at the Highway 556 turnoff.
Further details will be added as they become available.