Mohd Ali, Haji Anayat Ali of Kargil and their assistants Shero Ali and Nazir Ahmad of Kathua had gone to the higher reaches of Warwan in J-K's Kishtwar district to purchase livestock in August 1998 but did not return to their homes.
Two security forces personnel have been booked for their alleged involvement in the death of a youth in Poonch district of Jammu and Kashmir on Friday, police said on Sunday.
The FIR was registered after the chief judicial magistrate of Leh directed police on Wednesday to launch a probe into the matter.
Outgoing WFI president Brij Bhushan Sharan Singh has convened a meeting on Sunday to nominate his panel, which will contest the upcoming WFI elections to elect the new office-bearers.
Monday is the last date for filing nominations.
The Election Commission had earlier asked Twitter to remove the tweet by Mishra, a candidate from the Model Town seat.
The election is likely to witness a three-cornered contest involving the ruling Aam Aadmi Party, the Bharatiya Janata Party and the Congress.
