Union minister and LJP president Ramvilas Paswan was admited to the ICU of a private hospital in Patna after he complained of breathlessness on Thursday.
Paswan was rushed to Paras Hospital in the capital city and was being treated by senior doctors.
Paswan's younger brother and Bihar LJP president Pashupati Kumar Paras said that the minister complained of breathlessness and was taken to the hospital around 8.30pm where doctors were examining him.
As the news of Paswan's admission in the hospital spread, LJP supporters started gathering outside the hospital on Bailey road here.
Paswan, Union minister for food and consumer affairs, earlier arrived in Patna on a four-day tour of the state during which he had some political engagements in Patna, Khagaria, Begusarai and Mokamah before hosting Makarsankranti feast in Patna on January 15.
LJP spokesman Ashraf Ansari said that the minister's wife and MP son Chirag Paswan are with him in the hospital.
Sources said that Paswan may be airlifted to Delhi for further treatment.
(With inputs from PTI)