SM Azharul Islam, the district fisheries officer, said a team of local administration and officials concerned of the fisheries department conducted a drive in Meghna River with a speedboat and two trawlers on Tuesday night.
A trawler carrying 13/14 fishermen hurled brick chips at the officials, injuring five of them.
Mohammad Asaduzzaman, the upazila fisheries officer, Executive Magistrate (AC Land) Abu Abdullah Khan and Police constable Russel were among the injured.
They were taken to the Sadar Hospital.
Besides, river police arrested six people for catching hilsa illegally from Meghna River on Wednesday morning.
Police also seized 1,000 metres of net from their possession.
Read Also: Hilsa Preservation drives: Current nets worth Tk 9 cr seized, 178 fishermen jailed