Workers work on equipment Monday at the West End Substation at 6910 NC Hwy 211 in West End, N.C., where a serious attack on critical infrastructure has caused a power outage to many around Southern Pines, N.C. (AP Photo/Karl B DeBlaker)

RALEIGH, N.C. (AP) — Duke Energy said today it has completed repairs on substation equipment damaged in shootings over the weekend that cut power to thousands of central North Carolina homes and it expects power to be fully restored by midnight.

In a statement on its website, the energy company said all of the equipment damaged in an attack on two North Carolina substations Saturday has been fixed or replaced. The company said Moore County customers will gradually get power back throughout the day as it finishes testing and completes restoration safely.

“To avoid overwhelming the electrical system we will bring power back on gradually, with the goal of having the majority of customers restored before midnight tonight,” the statement said.

As of late this morning, about 14,000 customers were without power in the county, according to poweroutage.us. That’s down from a peak of more than 45,000 customers without power over the weekend.

Authorities have said the outages began shortly after 7 p.m. Saturday night after one or more people drove up to two substations, breached the gates and opened fire on them.

Police have not released a motive or said what kind of gun was used. But Moore County Sheriff Ronnie Fields told reporters Monday that whoever was responsible “knew exactly what they were doing to … cause the outage that they did.”

The FBI posted a notice today seeking information related to the investigation.

Schools are closed through Thursday. The Moore County School District will announce by 4 p.m. today whether schools will be closed to students Friday. Once power is restored, the district requires 24 hours to prepare the facilities before it can welcome back students.

FirstHealth Moore Regional Hospital, a 402-bed acute care facility in Pinehurst, regained power shortly after 9 a.m. today and was gradually transitioning from emergency generators to normal power, the hospital website said.

The county’s transportation services are operating only for clients who have scheduled dialysis, chemotherapy and radiation treatment, according to the Moore County website.