When one of them drowned, the two others tried to rescue him but met with the same fate, witnesses said
The arrangement was ordered by DMP Commissioner Md Shafiqul Islam, according to a statement released on Wednesday.
Eight water cannons will be used for spraying disinfectants in every police station area of the capital. The first spell will be held from 10am-12pm and the second session will begin at 4pm and end at 6pm.
The arrangement will remain in effect until further notice, the statement said.