Vijayawada MP Lagadapati Rajgopal, who used pepper spray in Lok Sabha, is now in the custody of the marshals of the lower house.
The three MPs, who were injured in the incident, are being treated at Ram Manohar Lohia Hospital in New Delhi.
Doctors of the hospital have informed the media that only three MPs were brought to the hospital so far.
The reports suggest that some other MPs, who suffered minor injuries in the incident, are being treated at the premises of the Parliament itself by a team of specialist doctors.
It may be recalled that Lagadapati is one among the six MPs suspended by Congress party recently.