GREENFIELD — Baystate Franklin Medical Center went on lockdown for roughly an hour Tuesday morning after a switchboard operator received numerous calls from a former patient warning that “the hospital’s going to blow up,” according to Police Chief Todd Dodge.

The lockdown began at around 8 a.m. and concluded after hospital security, police and Greenfield Fire personnel found there to be no true threat to public safety, according to Dodge.

“He said something like, ‘Your hospital is going to blow up.’ So obviously, everybody responded, a reverse 911 went out,” Dodge said. “Everybody working on the current shift went [to the scene] as well as supervisors, and they were taking various positions around the hospital until more information developed. Luckily, this went relatively quick and we were able to make contact with the individual.”

Dodge said the caller, an 18-year-old from Bernardston, had previously undergone mental health treatment at the hospital and had called after claiming he was dissatisfied with his service.

According to Dodge, the individual did not make any explicit threats, however, a written statement sent to the Greenfield Recorder from Maura Tobias, a spokesperson for Baystate Health, claimed the man called numerous times using “threatening and inappropriate language.”

Tobias said that although police confirmed there was no true threat, the High Street hospital enhanced its security after the lockdown out of an abundance of caution.

“Baystate Health Security and local law enforcement took immediate action for the safety of our team members and patients, and followed our Plan D policy and procedures. This included a lockdown of the facility while the threat was investigated,” Tobias wrote. “We are grateful to our team members for their response and following our policies, and their dedication to patients’ health and safety.”

Classifying the incident as a mental health-related event, Dodge said police are not yet certain whether charges will be fired against the individual. He added that the city’s reverse 911 system, which sends text alerts to residents in the event of an emergency, is a useful tool to inform the public of an immediate threat.

“I want to remind everybody to please reach out and contact Deputy Chief Christopher Greene to please enroll in that reverse 911 system,” he said. “That way, when an incident like this is developing, you will be notified.”

Anthony Cammalleri can be reached at acammalleri@recorder.com or 413-930-4429.