Two Boston city councilors are sounding the alarm on a “security breach” that occurred this week at City Hall, where an intruder was given free rein to rifle through office suites and steal wallets stuffed with cash and credit cards from employees. Councilors Ed Flynn and Erin Murphy are calling for the city to tighten up security protocols in light of the intrusion and theft revealed in an email from the city’s property management department that was sent to City Hall staff on Tuesday and obtained by the Herald. Meanwhile, Mayor Michelle Wu’s office said steps have already been taken to increase security patrols in response to the incident and a review is underway to determine whether protocols should be enhanced further. “Yesterday, an unauthorized member of the public entered several office suites in City Hall and stole personal belongings from employees,” Tuesday’s email from the city states. “Property management and Boston Police are aware of the incidents and are collaborating on the investigation, as this is unacceptable and clearly violates feelings of trust and safety in our workplace. “While City Hall is a welcoming building open to the public, only authorized personnel are allowed in office suites. This is a reminder that all staff need to be diligent, questioning any unfamiliar individuals within office suites, protecting all personal belongings, and alerting security of any suspicious behavior.” Multiple Boston Police Department reports shed more light on th