Cleaning staffs found copies of a letter--written by Sanaullah Hugli who identified himself as a member of the organisation--in different rooms of the District and Sessions Judge's Court yesterday morning.

The letter addressed Judge Md Mainuddin Islam and said he had been cautioned many times earlier to abstain from his duties and is now being asked for the last time to stay away from the court, "otherwise no one but Almighty Allah knows what will happen".

District judge Md Safiuddin and judge Mainuddin refused to make any comment on the matter but said the law enforcement agencies have been informed about the letter.

Security was increased on the Barisal court compound following the incident.