Boeing 707-337C SIGINT seen flying close to Pakistani Airspace. Flightradar24 glitch shows its partial flightpath inside Pakistan too.
Boeing 707-337C SIGINT platform is used by Aviation Research Centre (ARC) the airborne wing of R&AW and flown & maintained by the Indian Air force (IAF). It is reported that out of the two of them that RA&W owns, one is used for cannibalization to keep the only other able to fly.