Delhi chief minister Arvind Kejriwal, who is in Patna for a day-long visit to the state, was shown black flags on Thursday by three people who claimed to be supporters of social activist Anna Hazare, police said.
All the three protesters, who waved the flag outside the Lok Nayak Jayaprakash Airport, have been detained, officials said.
This is Kejriwal's first visit to Bihar after becoming the chief minister of Delhi for the second time. Kejriwal will be sharing the stage with his Bihar counterpart Nitish Kumar in a seminar on good governance, being organised by the Bihar Prashashnik Sudhar Mission. Later in the day, Kejriwal will visit Bodh Gaya along with Kumar.
Kejriwal's visit assumes significance in light of his growing proximity with Kumar, who was recently felicitated by the Aam Aadmi Party (AAP) chief at a function in the national capital.
During their last meeting, the two leaders had held hands on stage, embraced each other and ridiculed Prime Minister Narendra Modi.
The ruling Janata Dal(United) is hoping that the AAP's clout with the 16 lakh migrants from Bihar in Delhi and the NCR would help it in the forthcoming assembly polls in the state.
Kejriwal has said his party will not field any candidates in Bihar to ensure that anti-BJP votes are not split. He also requested people from Bihar, who live in the capital, last week to call their relatives and ask them to vote for Kumar.
Kumar's JD(U) did not field any candidate in the Delhi assembly election against AAP and its leaders even campaigned for Kejriwal's party.