"Arvind Kejriwal will attend HD Kumarswamy's oath taking ceremony. He has been invited by former prime minister HD Deve Gowda," the official told news agency PTI.
Mr Kumarswamy who visited the national capital on Monday to meet Congress president Rahul Gandhi and the party's senior leader Sonia Gandhi for a discussion on allocation of ministerial berths, also met Mr Kejriwal.
The May 12-Karnataka Assembly election resulted in a hung assembly, with the BJP emerging as the single-largest party with 104 seats, just 8 below the majority mark.
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