The Fire Service was able to tame the flames around 2:39pm
The number of arrestees and cases would rise, Md Muntasirul Islam, a deputy commissioner of Dhaka Metropolitan Police, told bdnews24.com on Monday.
Six people were detained over student-police clashes at Shahbagh on Monday.
Shahbagh Police Station OC Abul Hasan said the detainees would be released to their relatives.
The Awami League started two cases against unidentified people over the attack on its chief Prime minister Sheikh Hasina’s political office at Dhanmondi on Saturday following rumours, the ruling party’s deputy office secretary Biplab Barua said.