A man climbed a tower near the Metro Bhawan here demanding special status for Andhra Pradesh today, police said.
The man was seen holding a banner that read, "AP need special status (sic)".
The man has been sitting there for one-and-a-half hours, Deputy Commissioner of Police (New Delhi) Madhur Verma said, adding that efforts were being made to bring him down.
A fire tender has also been rushed to the spot.
A political battle over the special category status to Andhra Pradesh had led to the Telugu Desam Party (TDP) walking out of the NDA. Last week, the TDP moved a no-confidence motion against the government in the Lok Sabha over the issue, although the move was defeated.