Update: 10:08 a.m.
Highway 401 eastbound from Prescott to Cardinal has reopened.
Police say the Highway 401 eastbound on-ramp from Highway 16 southbound in Johnstown is expected to remain closed for an extended period of time.
More to come.
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Highway 401 is currently closed eastbound from Edward Street in Prescott to Shanly Road in Cardinal.
Police say emergency crews are responding to reports of a single passenger vehicle rollover near Johnstown.
Occupants are being assessed.
They are asking drivers to please use alternate routes.
