The Police Service of Northern Ireland (PSNI) issued an urgent warning to the public late on Tuesday night. It comes after an uncorroborated report that a "device" had been left in the Old Lurgan Road area on Portadown.
The PSNI is asking the public not to touch any "suspicious objects" and contact police immediately by calling 101 or 999 in an emergency. It said that no roads have been closed "at this time".
In a statement issued on Twitter at 11.17pm, PSNI said: "We are urging anyone who comes across, or who notices any suspicious objects in the Old Lurgan Road area of Portadown not to touch them and to call us immediately. "The warning follows an uncorroborated report earlier this evening, Tuesday November 1, that some type of device had been left in the area.