Motorists are being urged to avoid the Bodega Roundabout in Portadown after a lorry shed a load of bales on to the road.
The bales have also fallen onto the railway tracks below.
The incident happened around 9am.
A PSNI spokesperson said: “Could motorists please avoid the Bodega Roundabout heading on to the Northway (Craigavon bound) as it has been closed.
“Police are dealing with a lorry that has shed its load on the road and the railway track. Traffic diversions are in place for motorists to avoid the area.
“If transiting through the area can motorists go through the town centre.
“Your patience is appreciated at this time.”