Five days after a cyberattack forced City of Atlanta employees to turn off their computers to preserve the city’s network, officials declined to provide the public any new significant detail about the attack’s origin on Monday.

At a press conference at City Hall, an outside computer security consultant for the City of Atlanta said that his firm had completed the “investigation and containment phases” in response to the cyber attack.

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Bottoms said that city officials hadn’t found any evidence that sensitive employee or public data had been compromised in the Thursday attack. Still she urged employees and residents to monitor their accounts and credit activity.

She also did not rule out paying a $51,000 ransom being demanded to unlock the city’s computer system.