Detective Branch (DB) personnel came under attack during an anti-drug drive in Tongi under Gazipur City Corporation on Wednesday night.
Police later used sound grenades to bring the situation under control.
A total of 28 people were arrested in connection with the incident.
Police said the attack took place at Keranirtek under Tongi East Police Station. A DB team, led by Assistant Commissioner (DB South) of Gazipur Metropolitan Police Asabur Rahman, was conducting a drive at the house of listed drug trader Runa Begum in the evening.
At that time, a group of 10 to 12 people suddenly attacked the police team. The assault left two DB members seriously injured.
Police used four blank sound grenades to control the situation and ensure self-defence. Law enforcers then arrested seven people from the spot. It took nearly three hours to restore order.
In a separate drive in the Haji Mazar slum area under Tongi West Police Station, law enforcers detained 21 more alleged drug traders and users.
Gazipur Metropolitan Police Additional Commissioner (Crime and Operations) Md Belayet Hossain confirmed the incident. He said the situation is now normal and legal action is underway against those involved.
