actor1: Unidentified Armed Group (Bangladesh)
actor2: Civilians (Bangladesh)
notes: On Dec 21, at least four people, including Bangladesh Chhatra Maitry central president were injured in a bomb attack by unidentified militants near Shahbagh intersection in the capital on the first day of blockade programme enforced by the opposition alliance.
target_text: actor1: Unidentified Armed Group (Bangladesh), actor2: Civilians (Bangladesh)