The town of Frederick was notified Thursday that its computer network may have been hacked by a group known to carry out ransomware attacks.

The town of Frederick was notified Thursday that its computer network might have been hacked by a group known to carry out ransomware attacks. However, nearly a week later, the town’s system has shown no signs of having been infiltrated by ransomware.

“The town of Frederick recently became aware of an incident that involved unauthorized activity within the town’s computer network,” a news release issued by the town Tuesday said. “Specifically, a group associated with ransomware attacks has alleged that it gained access to the town’s network.”

A type of malicious software, ransomware often locks users out of their professional or personal computer system until they agree to pay a ransom.

“Upon receiving these allegations, (the town of Frederick) took immediate steps to secure its network against any possible intrusion,” the news release said. “(The town of Frederick) notified law enforcement, including the FBI.”

Vikki Migoya, a public affairs officer with the FBI Denver Field Office, confirmed that the bureau was aware of the situation and in communication with the town of Frederick. Migoya said the FBI “routinely advises both public and private sector partners concerning cyber threats.”

The town of Frederick has retained an outside digital forensics and incident response firm to help investigate the incident. Investigators will try to determine whether or not any unauthorized individuals accessed the town’s computer network and what, if any, personal data may have been impacted.

“The town of Frederick takes the security of the data it receives and maintains very seriously,” the news release said. “Should we become aware of any personal information affected by the incident, the town of Frederick will promptly notify individuals impacted and provide them with specific steps to take to protect their personal data.”

It isn’t clear which group claimed to have accessed the town’s network and if it demanded a financial payment.

Angela Wilson, the town of Frederick’s communications and engagement manager, said in an email Wednesday that the town was still in the process of investigating the incident but would not comment further.

“At this time, we do not have additional information to release,” Wilson said.

The town has maintained that the incident had no impact on any of its services or operations.