
The identities of the deceased could not be known immediately.
Four others were admitted to Sadar hospital in the incident.
Rafiqul Islam, officer-in-charge of Badalgachi thana, confirmed the matter.
Locals said seven people of Naogaon Sadar and Badalgachi upazila fell sick after taking liquor at a picnic on Friday.
They were rushed to Naogaon Sadar Hospital. Among them three people were in critical state and they were shifted to Rajshahi Medical college Hospital.
Later, they died in the morning.
NS/RI