[Updated at 8:16 a.m. ET] A Marine shot and killed two of his fellow service members at a Virginia base on Thursday night and then apparently killed himself, base officials said.

The incident took place at Marine Corps Base Quantico. The shooter gunned down a man and a woman, the spokesmen said. All are Marines - permanent personnel assigned to the officer candidate school.

Authorities did not disclose a motive and were investigating the incident. The identities of the victims were not immediately disclosed as authorities work to notify next of kin.