Police in separate drives arrested 30 activists of BNP and Islami Chhatra Shibir from different places of the port city.
The drive was conducted from Friday night till Saturday morning.
14 Shibir activists were arrested from Baklia area while 8 others of the same party from Dublmurring area, three Shibir and four BNP activists from Patenga area and one from Chakbazar area during separate drives, according to the officers-in-charge of respective police stations, reports UNB.
Police also conducted a drive at Shibir's South Zone office around 11:30pm but could not detain anyone from there, said Abul Kalam, officer-in-charge of Chakbazar Police Station.
