A CBI court convicted four policemen on Monday over a 20-year-old "encounter" that left four persons dead.

Declaring them guilty, Special CBI judge Rajesh Chaudhary said the quantum of punishment would be announced Wednesday. 

On November 8, 1996, five policemen -- Station Officer Lal Singh, Sub-Inspector Yogendra Singh and constables Ranvir Singh, Surya Bhan Singh and Subhash -- claimed to have shot dead four criminals.

The four, who turned out to be innocent, were identified as Jasbir Singh, Ashok Kumar, Pravesh and Jalalludin.

While constable Ranvir Singh died during trial, Surya Bhan was not in the court on Monday. The other three have been sent to jail.

A young IPS officer, Jyoti S Belur, who was 28 when she was listed as a co-conspirator, did not appear in court despite several summons. She is said to have migrated to the UK.