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SAN DIEGO – One or more computer systems at the Port of San Diego have been disrupted by a sophisticated cyberattack involving ransomware, Port officials revealed Thursday.

The attack was first reported to Port officials on Tuesday, according to a statement from the Port.

“The Port of San Diego continues to investigate a serious cybersecurity incident that has disrupted the agency’s information technology systems, and the Port’s investigation so far has determined that ransomware was involved in this attack,” said Port of San Diego CEO Randa Coniglio in a written statement. “The Port has mobilized a team of industry experts and local, regional, state and federal partners to minimize impacts and restore system functionality, with priority placed on public safety-related systems.”

The team working on the attack was still trying to determine the timing of the attack and the amount of damage to the Port’s information systems, Coniglio said. It has affected systems used by both the Harbor Police and computers used by other Port employees, he added.

The Port did not release other details about the attack, but security analysts told the San Diego Union-Tribune that the attack has similarities to a ransomware attack against the city of Atlanta in March. In that attack, criminals were able to shut down key services, including wireless communications at the Atlanta airport and demanded bitcoins to restore access to the computer systems.

The attack has been reported to the California Office of Emergency Services and the County of San Diego Office of Emergency Services, Port officials said.