The boat carrying 11 people, including three boatmen, capsized in evening, they said.
While three persons were rescued, one body has been fished out so far, a senior police officer said.
"Seven people are feared drowned in the incident which occurred between 6 pm and 6:30 pm. While three persons -- two boatmen and a college student -- were rescued, one body was fished out in the night," said Shailesh Balkawade, SP, Nagpur Rural.
According to the officer, out of 11 people on the boat, at least eight were from Nagpur and reportedly in the age group of 20-25.
The SP said efforts are on to look for survivors, if any.
He said the cause behind the incident was not known immediately.