"Deeply pained & saddened by Kamla Advani ji's demise. She always inspired & motivated Karyakartas & was LK Advani ji's pillar of strength," Modi tweeted.
"I recall my many interactions with Kamla Advani ji. My thoughts are with the Advani family in this hour of grief. May her soul rest in peace," he added.
83-year-old Kamla Advani died today at the All India Institute of Medical Sciences (AIIMS) due to heart failure.
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Home Minister Rajnath Singh also condoled the death of Kamla Advani.
"Deeply pained to learn the demise of Smt Kamla Advani. May God give Advaniji and his family the strength to bear this irreparable loss," he said.