The incident occurred when the newly appointed Congress in-charge for Jharkhand B K Hariprasad was meeting party leaders at the Congress Bhavan.
There is, however, no report of injury to anyone.
"We have received information that a gunshot was fired near Congress area (Bhavan). The police are investigating the incident," superintendent of police (city) Manoj Ratan said here.
Jharkhand PCC spokesman Sailesh Sinha claimed the incident happened outside Congress Bhavan.
"Indiscipline will not be tolerated in the party," he said, adding the party leaders were at Congress Bhavan and looking into it.