 And it all appears to have been random. According to a press release from the park, rangers responded to reports of someone with a firearm making threats. When they contacted the person, there was an exchange of gunfire and the suspect was killed in the shootout. The injured ranger is said to be in stable condition and being treated at a nearby hospital. The FBI is investigating the incident and the park says there are no active threats to the public at this time. That's CBS News correspondent Lindsay Reiser.