ROCKVILLE, Md. — Montgomery County Council members will get a briefing on what’s been learned about the 911 outage that left residents getting a busy signal for two hours on Sunday night.

The council’s Public Safety Committee, led by Council Member Marc Elrich, will hold a work session on Thursday, July 28, at 9 a.m.

After the 911 outage, County Executive Ike Leggett called for an investigation. Leggett’s spokesman, Patrick Lacefield, told WTOP this week that the council would be briefed on what’s been learned about the service failure.

Beginning at 11:10 p.m. on Sunday, the 911 system shut down for about two hours after an air conditioning unit failed. During that time, the county posted information on its Alert Montgomery emergency alert system directing residents to call 311 or to contact their nearest police or fire stations.

During the outage, a 91-year-old woman and a 40-year-old man. County officials say it has not been determined whether the deaths were directly related to any possible delays in service.