New Delhi: Mrs Paola Maino died at home in Italy on Saturday. She was in her 90s.
AICC general secretary Jairam Ramesh who revealed the news also said on Twitter that Sonia Gandhi had left on August 23 to visit her ailing mother.
All of the Gandhi family including Sonia, Rahul Gandhi and Priyanka Gandhi Vadra are said to have attended the funeral on Tuesday.
The three leaders had on Sunday attended an online meeting of the Congress Working Committee, where the schedule for election to the party president's post was decided.
President Droupadi Murmu, Prime Minister Narendra Modi and leaders of various parties conveyed their condolences to Sonia Gandhi and her family.
"Condolences to Sonia Gandhi Ji on the passing away of her mother, Mrs. Paola Maino. May her soul rest in peace. In this hour of grief, my thoughts are with the entire family," Prime Minister Modi tweeted.
Rajasthan Chief Minister Ashok Gehlot, Chhattisgarh Chief Minister Bhupesh Baghel and other Congress leader extended their condolences to the party chief and other family members.
"Congress family expresses its deepest condolences on the sad demise of Mrs Paola Maino, Congress president Mrs Sonia Gandhi's mother. We pray for the departed soul and stand in solidarity with the bereaved family," the Congress said on its official Twitter handle.
"It's very saddening to know about the demise of Congress President Smt Sonia Gandhi ji's mother Mrs. Paola Maino ji. My deepest condolences to Sonia ji, Rahul ji, Priyanka ji and all family members. May God give them the strength to bear this loss. May the departed soul rest in peace," Gehlot said on Twitter.
In his message, National Conference leader Omar Abdullah said: "I join my father and other family members in conveying our heartfelt condolences to Mrs Sonia Gandhi ji, to Rahul, Priyanka and the entire family on the sad demise of Mrs Gandhi's mother. May the soul of Mrs Maino rest in eternal peace," he said.
Another Congress MP Manish Tewari said, "My profound condolences on the sad demise of Hon'ble Congress President Mrs Sonia Gandhi ji's revered mother Mrs Paola Maino. May God give the Hon'ble Congress President and her family members the strength and fortitude to bear this unfortunate and tragic loss."
PTI with edits