RJD chief Lalu Prasad on Saturday denounced Delhi High court's ruling decriminalising gay sex and said the Centre should appeal against the judgement in the Supreme Court.

"Gay sex should not be legalised at any cost and the Centre should appeal against the verdict in the Supreme Court. I am dead against legalisation of gay sex and will strongly raise the issue in Parliament. Section 377 of the IPC should not be amended," Prasad said.

Asked whether homosexuality is still a crime, he said: "Yes, it is a crime... Such obscene acts should not be allowed in our country. The society is adversely affected."

"Such things which affect the society should not be permitted at all... Government has a greater responsibility towards the society," Prasad said.

"I don't want to talk about such rubbish things. These are obscene things which our country and culture do not permit," he said.

The Delhi High Court had on Thursday legalised gay sex among consenting adults holding that the law making it a criminal offence violated fundamental rights.