Fire broke out on Monday morning at the headquarters of the Federal Inland Revenue Service (FIRS) in Abuja.
Officials said the fire affected a store attached to a canteen used by the agency’s staff members at the headquarters’ annex.
FIRS spokesman, Wahab Gbadamosi, said the inferno was contained from further spread by firemen.
“Firemen who put out the fire are investigating the source of the fire,” he said.
Footage seen on social media shows firemen standing atop a fire truck and pouring water as thick smoke billowed from a patch of the building.
It is not known if important documents were destroyed in the fire.