While there was no official word on the invitation extended by the Indian government to Sharif, state-run Pakistan Television and Radio Pakistan quoted a Foreign Office spokesperson as confirming that the invite had been received.
"Prime Minister Nawaz Sharif has been invited to attend oath-taking ceremony of Narendra Modi as Prime Minister of India," Radio Pakistan said.
A top source at the Pakistan Foreign Office told Dawn daily that no decision had yet been taken as to who would represent Pakistan at the ceremony.
After Modi-led BJP won a resounding mandate in the general election, Sharif had telephoned the Prime Minister-elect and invited him to visit Pakistan.
The invitation for the swearing-in ceremony has come as a pleasant surprise to some Pakistani analysts who had expressed apprehension over the ties with India under Modi.