"In what capacity did Chief Minister Nitish Kumar tour Pakistan three years ago when the neighbouring country has been abetting terrorism in India and now threatening to use nuclear weapons against our country," he asked in a series of tweets.
"Who all he was trying to send a message to by visiting Pakistan which neither shares borders with Bihar nor has business ties with our state?...There is no prospect of Pakistani investor coming over to Bihar," he said.
Incidentally, Modi was the deputy chief minister in the erstwhile NDA government when Kumar had led a delegation for the week-long visit to Pakistan in November 2012.
On the chief minister asking the Prime Minister Narendra Modi for a debate at the time and place of the latter's choice, Modi dared Kumar to debate with him and Nandkishore Yadav, who is the Leader of Opposition in the legislative Assembly.