A complaint about a photograph showing the 11 people killed in the 1987 Enniskillen Poppy Day bombing is being investigated by the Ambulance Service.
The bomb, which exploded on 8 November 1987, killed 11
It is believed a member of staff at the Enniskillen depot where it was on display described it as "offensive".
The Ambulance Service refused to confirm or deny if the photograph had been removed from display at the depot.
DUP MLA Arlene Foster said it was there as a tribute to Kitchener Johnston, a member of staff killed in the bombing.
She said it had been hanging on the wall for many years.
Ulster Unionist MLA Tom Elliott urged the Ambulance Service not to remove the photograph.
"I am aghast that a simple tribute by workmates can be targeted in such a sectarian way, and I urge those concerned not to bow to this absurd pressure in order to appear politically correct," he said.
A spokesman from the service said they were investigating an incident and hoped it could be resolved.
Eleven people were killed in the IRA explosion in Enniskillen, County Fermanagh, on 8 November 1987. The blast injured 63 people, many of whom have never fully recovered.
It happened on Remembrance Sunday - the day when those who lost their lives during the First and Second World Wars are remembered.