6:36 a.m.: All lanes of I-83 have reopened, PennDOT says.
Previous story: All lanes of Interstate 83 southbound are closed in the northern part of York County Thursday morning.
The closure is from Lewisberry Exit 35 to Newberry Township Exit 33, according to the Pennsylvania Department of Transportation.
A crash involving a tractor-trailer happened at the site around 3:30 a.m., PennDOT said. There is a fluids leak.
Check back later for more information.