According to Alan Warren's Singapore 1942:
..eighty Japanese fighters and bombers had flown over Georgetown unopposed...Thousands of people had filled the streets to watch the spectacle,which turned to tragedy when the bombs began to fall.Aircraft had then wheeled down to dive-bomb and strafe.Mass panic was the result of the bombing,and Penang had no anti-aircraft guns and few air raid shelters.Most of the bombs fell by design on Georgetown's densely populated Chinatown..
...The fires burnt in Georgetown for days..it was estimated that six hundred civilians had been killed and another 1100 wounded in the air attacks..