Karunanidhi, taken into confidence by Indira on Katchatheevu, agreed to give Sri Lanka island

There was, however, something amiss about this particular one: The usually alert Sezhiyan was probably unaware that TN CM M Karunanidhi had given his concurrence to the agreement more than a month ago. In fact, the DMK leader was perhaps the only person barring the PM and “one or two senior Cabinet ministers” who may have known the contours of the agreement that was in the works.

source https://timesofindia.indiatimes.com/india/karunanidhi-taken-into-confidence-by-indira-on-katchatheevu-deal-agreed-to-give-sri-lanka-island/articleshow/108924845.cms