The SP said three police constables fell temporarily ill after washing their hands and faces with the water.

Police have filed a sabotage case against 54 people over the alleged contamination of the water supply at Alinagar Police Outpost in Jungle Salimpur in Chattogram's Sitakunda.

Sitakunda Police Station lodged the case last night (26 July) naming 34 accused and also mentioning 20 unidentified people.

Officer-in-Charge Md Mohinul Islam told The Business Standard that police have launched an investigation into the alleged sabotage.

He said police named Yasin, the alleged leader of the criminal group known as Yasin Bahini in Jungle Salimpur, as an accused.

Keep updated, follow The Business Standard's Google news channel Superintendent of Police Md Masud Alam said earlier that around 300 members of the police, Rapid Action Battalion (RAB) and Border Guard Bangladesh (BGB) are stationed at the camp, which receives its water supply through storage tanks.

He said the motor operator on duty noticed a strong foul smell and unusual signs in the water while starting the supply before dawn yesterday.

Officials later found the same condition in every water tank and recovered an empty bottle believed to have contained a poisonous substance.