The closure is causing traffic on the M25 and other major roads in the area.
The motorway had been closed but reopened at around 3pm, with hour-long delays.
Traffic on the road is stretching back to junction 29 for the A127 on the clockwise carriageway, while anticlockwise has delays going to junction 3 for the M20.
The A13 is also very busy near Lakeside as a result.
#A282 #M25 residual delays of least 60mins for both directions following an earlier police incident at the #Dartford Crossing. #Kent #Essex … Thanks for your patience this afternoon. Further details here: https://t.co/dWuMux6yDF #DartCharge..
— Highways England (@HighwaysSEAST) May 17, 2019
More to follow.