The surprise meeting was held in a house in Golf Links of Delhi in which former Army Chief General VK Singh is believed to have been present.
The meeting came soon after the 75-year-old Anna had a tumultuous meeting with his team over the anti-corruption movement taking a political plunge.
Pramod Joshi, a spokesperson for yoga guru Ramdev, confirmed the meeting but said he was not aware of what was discussed in the meeting.
There was also no confirmation about VK Singh's presence in the meeting.
Anna had earlier skipped the protest organised by Ramdev in Delhi last month.