Pantai fire chief Hamid Daud said they were alerted to the incident in Bangsar at around 10.03am on Monday (Jan 28).
"We dispatched five fire engines and 60 personnel from the Pantai, Hang Tuah, Taman Tun Dr Ismail, Sentul and Seputeh Fire Stations to the scene.
"They arrived at Kuarters KTMB Jalan Lengkok Abdullah, Bangsar, 13 minutes later and began to put out the flames," he said at the scene on Monday.
He said 11 cars and six motorcycles also caught fire during the incident.
"We managed to put out the flames at 12.20pm and our men are now evaluating the scene, including floors five, six and eight of the Sri Pahang flats near the long house which caught fire.
"Fortunately, there were no injuries or loss of life in the incident but the cause of the fire is still under investigation," he said