Detectives came under attack during an anti-drug drive at Tongi of Gazipur City Corporation on Wednesday night, prompting police to use sound grenades to bring the situation under control.
A total of 28 people were also arrested in connection with the incident.
According to police, the incident took place at Keranirtek under Tongi East Police Station when a team of the Detective Branch (DB), led by Assistant Commissioner (DB South) of Gazipur Metropolitan Police (GMP) Asabur Rahman, conducted a drive at the house of listed drug trader Runa Begum in the evening.
At that time, a group of 10-12 people launched a sudden attack on the police team, leaving two members seriously injured.
To control the situation and ensure self-defence, police exploded four blank sound grenades and later arrested seven people from the scene. It took nearly three hours to bring the situation under control.
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.
Confirming the incident, GMP Additional Commissioner (Crime and Operations) Md Belayet Hossain said the situation is now normal and legal action is being taken against those involved.