Updated around 4:55 p.m.
OPP Communications for the North East region have confirmed through Twitter that all lanes of Hwy 17 near Pioneer Street have been reopened.
OPP Communications for the North East region tweeted at approximately 9:25 a.m. this morning, that Hwy 17 at Pioneer Street in Markstay had been reduced to one lane.
Possible delays are expected within the area.
No details as to the cause of the closure or when all lanes will be re-opened, have been released.