The belongings of Delhi Chief Minister Atishi were also removed from the residence, which was earlier occupied by her predecessor Arvind Kejriwal, a statement from the Delhi CMO said.
Two days ago, the 86-year-old's social media handle had carried a signed message from him dismissing rumours and asserting that there was "no cause for concern".
Several opposition leaders accused the Congress of banking on regional parties where it is weak but not forging alliances when they perceive they are strong in a state.