A U.S. Navy nuclear submarine and an Aegis cruiser collided during routine training off the U.S. East Coast on Saturday afternoon.
No one aboard either the USS Montpelier or the USS San Jacinto was injured, Pentagon officials told NBC News. Both vessels continued to operate under their own power.
The Montpelier is a nuclear-powered Los Angeles-class fast attack sub launched in 1991. The San Jacinto is an Aegis-class missile cruiser commissioned in 1988.