The four victims all died in the blaze at the rented bungalow on Molly Road in Derrylin in the early hours of Tuesday, February 27th.
As the service was underway, police issued the first photographs of the four fire victims along with a further appeal for information.
The PSNI have yet to release the names of the four victims who lost their lives in the blaze at the rented bungalow on Molly Road.
Multiple murder accused due back in Enniskillen court on Monday.
Wearing a grey tracksuit and in handcuffs, Allen stood as the charges were read out in court during the brief hearing.