Update: According to Montgomery County's Department of Public Safety's Facebook, Verizon reported that service was fully restored at 5:18 a.m.
Callers to 9-1-1 in Montgomery County may be experiencing "degraded service" Thursday afternoon, officials said, adding that callers should use cell phones if they have problems with land line calls.
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The problems were expected to last "several hours to fully restore landline phone service," the county said shortly before 5 p.m.
"Callers using landlines to call 9-1-1 could receive a busy signal. If that happens, the caller should use a cellular phone to call 9-1-1 or hang up and call again," county deputy public safety director John Corcoran said.
He said the problem appeared to originate after a contractor struck a conduit containing communications lines.
"The Department of Public Safety has been alerted that a cable providing phone service in this area has been cut and that is causing degraded service for 9-1-1 calls coming into Montgomery County’s Emergency Communications Center," Corcoran said. "We do not have an estimate for how long it will take phone providers to locate the problem and fix it."
He said additional information would be provided as soon as possible.
Check back for more details as they become known.