St. Paul Mayor Melvin Carter says the city suffered a digital security breach by a targeted attacker starting last Friday. Wireless internet in city buildings is down, and it's not known how much data has been compromised.

The city of St. Paul has become the latest target of a cyber attack targeting essential systems and digital services.

Jake Trippel is dean of the College of Business and Technology at Concordia University, where he also chairs the master’s in business administration, which includes a specialty in cybersecurity.