School boards in South Dakota will be able to let school employees, hired security personnel or volunteers carry guns in schools under a law signed Friday by Gov. Dennis Daugaard.

The law, set to go into effect July 1, will let school boards establish "school sentinel" programs. Under these programs, the school boards can arm people "to secure or enhance the deterrence of physical threat and defense of the school, its students, its staff, and members of the public on the school premises against violent attack," according to the legislation.

All school sentinels would first be required to complete a training program.