premise: Entire capital city Dhaka and its surrounding areas have been brought under "terror alert" following an intelligence report about possible militant bomb attacks ahead of opposition's planned grand rally in the city on Tuesday.
  According to the intelligence report, the banned Islamist outfit the Jamaatul Mujahideen Bangladesh (JMB) blamed for country- wide bomb blasts on Aug. 17 which left three people killed and over 150 others injured, has again planned for a series of bomb attacks in the capital city.
  Different groups of the said militant outfit are trying to dispatch a huge quantity of high explosive to Dhaka through land or riverine routes.
  The JMB is also trying to gather its some highly trained cadres along with the members of "suicide squad" to accomplish their mission.
  The JMB might go for blasting high-powered explosives in Dhaka to eliminate opposition and ruling party leaders, high officials including judges and also general people.
   What did the bomb blasts cause?
hypothesis: report about possible militant bomb attacks