A factional clash foiled the council of Bangladesh Chhatra League (BCL) north unit in the port city on Tuesday, injuring at least 13 activists of both groups.
The clash erupted around 12 noon when the council session was in progress at Engineers Institute in Chittagong in presence of Awami League presidium member Engineer Mosharraf Hossain.
A cocktail went off in the council auditorium when a BCL vice-president was delivering his speech, triggering the clash between two rival groups of BCL, said Jashim Uddin, officer-in-charge of Chittagong city Kotwali Police Station.
The two rival groups threw chairs and chanted slogans against each other during the incident, witnesses said.
The council session was foiled due to the infighting, the OC said.
Additional police were deployed in the area to fend off any further unwanted situation, he added.