Besides pollution and malodour, the slippery waste causes vehicles to skid
The elite police unit said those arrested were involved in gun running.
RAB -1 chief Mohammad Masud said the arrests were made during raids at the capital's Abdullahpur and Badda.
"Three were arrested from Adbullahpur with firearms. Two more were arrested from Badda on information they provided," he said.
The RAB officer said details will be provided at a media briefing later in the day.