No one was injured in the incident, police said.
Prima facie it appears that the firing was an outcome of a personal enmity, they said.
The service station is owned by Ram Kumar, who was not there at the time of incident.
Kumar's employee Vikas, who was inside the service station when the armed youths opened fire, informed police about the incident.
A case has been registered and the matter is being probed, a senior police officer said.