YSR Congress chief Y S Jaganmohan Reddy was Monday detained along with 19 supporters while they were marching towards parliament protesting the centre's decision to bifurcate Andhra Pradesh, police said.
Jagan, as he is popularly known, and his supporters were stopped by police at Parliament Street while they were marching from Jantar Mantar in central Delhi.
"Reddy, along with his 19 supporters, was detained and taken to the Parliament Street police station. They were later allowed to go," a police officer said.
Earlier, while staging a protest, Jagan said the chaos in the Lok Sabha was engineered by the Congress party.
"Congress engineered the chaos in the house," he alleged, noting that the person who used pepper spray in parliament - Lagadapati Rajagopal - was a Congress MP.
"Of the MPs suspended, majority of them belong to Seemandhra. Now there is nobody to protest in the house. So, the Congress party plotted it. The only way they could do this is create a scene," he added.
Jagan was also among the 16 members suspended from the Lok Sabha by the speaker.