The ongoing cyberattack on the City of Birmingham is causing a shortfall in public safety, according to the Fraternal Order of Police Birmingham Lodge 1.

Officer Deangelo Hall, president of the state’s largest FOP, penned a letter to Mayor Randall Woodfin to address the massive hack that has disrupted the city’s network. The letter was written on the same day the city confirmed the attack.

“Significant concerns have been presented to the Fraternal Order of Police regarding the City of Birmingham’s lack of transparency in the handling of the recent cyberattack against the city,’’ Hall wrote.

“The lack of information from leadership has led to feelings of uncertainty and disregard among city employees and citizens.”

Hall said there are multiple complaints by employees that they are not being fully compensated or, in some cases, not being paid at all.

Additionally, he said, the lack of pay stubs has added to the frustration and distrust among employees who simply want proper compensation and assurance that their benefits have been paid and will not be interrupted.

“These issues have contributed to low morale among city employees, especially within the police force, exacerbating the current difficulty in hiring and retaining officers,’’ Hall wrote.

City officials have stressed that the 911 system has not been affected. Emergency operations remain functional.

However, the computer hack has caused some problems for law enforcement with police facing limitations on checking to see if a vehicle has been reported stolen or if a person has outstanding warrants, AL.com has reported.

“This ongoing issue has negatively affected essential services due to the police department’s disruption of internal resources that has made officers’ jobs increasingly more difficult,’’ Hall wrote. “As a result, the city has suffered a shortfall in public safety.”

In a memo sent to city employees Wednesday, Woodfin’s office provided a brief update on the network disruption, and acknowledged for the first time that hackers accessed the city’s computer systems.

“This process is ongoing; however, based on the investigation thus far, we understand that an unknown third party gained access to our systems for a period of time,” according to the memo sent to employees by Rick Journey, the mayor’s communications director.

Officials said the problems began on March 6 when they observed unexpected activity that disrupted operations of some computer systems.

Multiple government sources have told AL.com that the city is the victim of a ransomware attack, with hackers gaining access to the city’s computer systems and demanding payment for the city to get its data back.

“Upon learning of the unexpected activity, we took steps to confirm the security of our network,” the memo reads. “We are working to restore full functionality to our systems as soon as possible.”

The mayor’s memo to city employees came a day after AL.com reported that the city had been the victim of a ransomware attack by hackers.

Journey on Friday, in response to questions from AL.com, said as he has previously stated, employees who have questions about their compensation are encouraged to contact their department’s payroll coordinator.

“The finance department has been working with each department to assist in resolving any issues involving pay and continue to do so. Those issues do not appear to be widespread,’’ Journey said.

“Of the 3,300 payments distributed in this current pay period, 1.2% were identified to have discrepancies.”

Journey said the city is committed to fully resolving each and every matter on an individual basis.

Journey also said critical public safety and public works services have continued uninterrupted throughout the current situation.

Woodfin’s office declined to respond specifically about FOP concerns about lack of confidence in public safety caused by the hack.