A furniture factory manager was among four individuals arrested for hoisting the Jalur Gemilang and the Johor state flag upside down in an incident at the Tebrau Industrial area, yesterday.

Johor police chief Ayob Khan Mydin Pitchay said the manager, aged 56, human resources officer, 29 and a female logistics clerk, 23, all locals, and a Bangladesh national, 35, were detained.