NEW DELHI—A firing incident inside a military station in northern India killed at least four soldiers early Wednesday, an army statement said.

The statement didn’t give details, saying only that quick reaction teams were activated, and the area cordoned off and sealed.

Indian media reports quoted state police officers as saying that the incident in the army camp in Bhatinda in Punjab state bordering Pakistan did not appear to be a terror attack.

The shooting took place as the state was on a high security alert a day ahead of Baisakhi, a major Sikh and Hindu festival marking the start of the harvesting season.

India accuses neighboring Pakistan of supporting the insurgency in Indian-controlled Kashmir and Punjab, a charge Islamabad denies.