BUFFALO, N.Y. — Buffalo Public Schools is working with the FBI after falling victim to a ransomware attack.

The district says its IT department immediately jumped into action when the incident occurred Friday morning.

Remote classes were canceled because of the attack.

The district is working with cybersecurity experts to assess the extent of the breach and recover critical systems.

So far, no demands have been made, but the FBI says there is a ransom anywhere between $100,000 and $300,000.

BPS officials say the superintendent approved an emergency contact with Grey Castle, a cybersecurity and risk management firm, to help investigate.

They're hoping to determine the scope of the problem and when services will return to normal within the next few days.