The four militant groups that had threatened people against taking the inaugural Srinagar-Muzaffarabad bus on Wednesday claimed they had the list of the next batch of passengers and warned them against boarding the vehicle on April 21.

"The list of passengers [who will be] on the second bus is being sent to the media so that they can be warned against undertaking the journey in this coffin," a statement quoting Samir Abdullah, 'joint spokesman' of Al Nasireen, Al Arifeen, Save Kashmir Movement and Farzandan-e-Millat said in Srinagar.

"The prospective passengers are hereby forewarned that they should not endanger their lives by boarding the bus," he said.

The presence of the second list with the militant outfits contradicts the claims of Jammu and Kashmir Chief Minister Mufti Mohammad Sayeed that there was no leakage of information from the government side, the statement said.

The four militant organisations made a failed bid to target the passengers on the first bus by attacking the Tourist Reception Centre on April six. They also fired rifle grenades towards the bus on the day of historic inaugural journey after a gap of over 50 years on April 7.