"Over 48,350 activists of Jamaat-e-Islami and its allies have been sued in Dhaka and 10 other districts in connection with Friday's violence."
How can the government sue 50k people in one day, I hear you say. Welcome to Bangladesh! If you look further down in the article, it takes a distinctively Orwellian twist:
Police sued 5,000 persons, naming 70, activists of Jamaat, Shibir and
their allies for Friday’s vandalism at Sylhet central Shaheed Minar and
other parts of the district.
So what about the remaining 4930 activists? Here's a guess: the forms have been filled in, only the "name" fields remained empty. When a suitable candidate who the police doesn't particularly like pops up, his name is scribbled down in the right box, and lo! he participated in riots and is in for some serious jail time.