Lawyers practising in six city court complexes on Thursday went on a day-long strike, protesting registration of a criminal case against Rohini Bar Association president and secretary for allegedly beating the station house officer of Keshav Puram police station in northwest Delhi.

The flash strike by advocates has affected work in courts.

The agitated lawyers said the registration of the "false First Information Report" against their colleagues was to "counter" the contempt proceedings being initiated against the Keshav Puram police station SHO Vijay Vats by Motor Accident Claim Tribunal Judge Chandra Bose for hurling abuses and threatening him in the open court.

"We are observing a complete strike today against high handedness of the Keshav Puram SHO. He has registered a counter case against the office bearers of Rohini Bar Association after he came to know about the contempt proceedings being initiated by the judge for being abusive to him in the open court room," said Rajiv Khosla, spokesperson of the co-ordination committee of city's all bar associations.

Khosla said an inquiry should be conducted in this matter as the SHO had allegedly slapped advocates in the court room when the lawyers objected to his being abusive to the judge.

Following the incident, SHO Vats swas allegedly beaten up by lawyers of Rohini court in the court premises on Tuesday.

Vats had gone there to attend the court proceeding in a road mishap case in which he was the investigating officer.

During the hearing of the case in court number 19 of Rohini Court Complex, he said something which irked the judge and the lawyers.

The proceedings in the 2G case at Patiala House Court complex, however, remain unaffected with counsel from various sides continuing their arguments on a Union Law Ministry report on legal definition of term associates of commercial firms.