"Kejriwal is likely to attend Kumar's oath-taking ceremony which will be held next week," said an AAP functionary.
However, the CM office is yet to receive an invitation.
During Bihar Assembly elections, Kejriwal had made a strong appeal to the people of the state to return incumbent Chief Minister Nitish Kumar to power.
"I appeal to the brothers n sisters of Bihar to vote to make Nitish ji the CM of Bihar," Kejriwal had tweeted.