The BJP benches erupted with protests, and the opposition members retaliated.
In a dramatic confrontation in parliament on Thursday over Congress leader Adhir Ranjan Chowdhury calling President Droupadi Murmu "Rashtrapatni", Congress president Sonia Gandhi reportedly rebuffed Union Minister Smriti Irani after walking across the house to speak to a BJP MP.
When Smriti Irani reportedly cut in, Sonia Gandhi said "Don't talk to me", according to sources.
The Congress and other opposition parties accused Smriti Irani and other BJP MPs of heckling Sonia Gandhi.
The hostile exchange took place after Lok Sabha adjourned amid loud protests by BJP MPs against Sonia Gandhi and Adhir Ranjan Chowdhury. "Sonia Gandhi, apologise," Smriti Irani had said in the house, with members of the ruling BJP holding up placards.
"Sonia Gandhi, you sanctioned the humiliation of Droupadi Murmu. Sonia ji sanctioned humiliation of a woman in the highest constitutional post," the Union Minister said.
After the house was adjourned, Sonia Gandhi was about to leave when she decided to speak to BJP MP Rama Devi instead. Two Congress MPs were with her.
In a stunning move, the Congress president crossed the floor of the House and reportedly said to BJP MP Rama Devi: "Adhir Ranjan Chowdhury had already apologised. What is my fault?"
Sources say Smriti Irani interjected and said, "Madam, may I help you? I took your name."
To which, Sonia Gandhi retorted: "Don't talk to me."
A Congress leader said Sonia Gandhi was "having a polite conversation" with Rama Devi when Smriti Irani came at her with pointed fingers. The leader claimed Ms Irani said: "How dare you, don't behave like this, this is not your party office..."
According to the Congress leader, Sonia Gandhi told Ms Irani twice: "I am not speaking to you." The Congress president was "heckled", and the situation became volatile, said the leader.
Trinamool Congress MPs Mahua Moitra and Aparupa Poddar and NCP's Supriya Sule were seen drawing Sonia Gandhi away from the shouting BJP members. Union Parliamentary Affairs Minister Pralhad Joshi later stepped in to defuse the situation.
Sonia Gandhi reportedly said later that she was only trying to speak to Rama Devi as she knew her. "I am not afraid. I know Rama Devi so I went to tell her Adhir has apologised and why are you attacking me?"
Mahua Moitra called it an orchestrated attack on Sonia Gandhi.
Finance Minister Nirmala Sitharaman, in her retelling of the incident, slammed Sonia Gandhi: "Some of our Lok Sabha MPs felt threatened when Sonia Gandhi came up to our senior leader Rama Devi to find out what was happening during which, one of our members approached there and she (Sonia Gandhi) said - You don't talk to me - putting our MP down in the house. So instead of remorse from the highest leader of the Congress party, we find greater aggression."
Furious Congress leaders accused Smriti Irani of attacking their party chief.
"Union Minister Smriti Irani behaved indecently and abusively in Lok Sabha today! But will the speaker condemn it? Are rules only for the opposition," tweeted Congress leader Jairam Ramesh.