Carla Lockhart, the MP for Upper Bann, said the circumstances surrounding the man’s death are not yet known but she expressed sympathy to his loved ones.
“Behind this news is a family facing the most devastating circumstances, and they should be very much in our thoughts this morning,” she said.
The Democratic Unionist Party (DUP) MP added it would have been “an extremely difficult scene” for members of the emergency services to witness.
Lockhart said it was “extremely important” that the police “are given the time and space necessary to carry out a full and thorough investigation”.
“I have been liaising with the PSNI in relation to this tragic incident and will remain in contact as their investigation progresses.
“I would appeal to everyone to please avoid speculation on social media, particularly around the identity of the deceased or the circumstances surrounding what has happened.
“Speculation helps no one and can cause enormous additional distress to a family at an already incredibly difficult time.”
She urged anyone with information about the incident to contact the PSNI.
“A very sad morning for Portadown. My thoughts and prayers remain with the family and all those impacted,” Lockhart added.