The two journalists killed during a live TV report were both shot in the head.
Reporter Alison Parker, 24, and cameraman Adam Ward, 27, died of gunshot wounds to the head and body, a Virginia coroner said.
Their former colleague Vester Flanagan shot himself when police caught up with him three hours from the scene of the killings.
Barack Obama has called for tougher gun laws after the Virginia shootings in which two journalists were shot dead on live TV.
In an interview with WPVI-TV, the President said: "It breaks my heart every time you hear about these kind of incidents.
"What we know is that the number of people who die from gun-related incidents around this country dwarfs any deaths that happen through terrorism."
In a separate interview with KIRO-TV in Seattle he said: "Sadly these events happen all too often.
"It's a testimony in this case to the fact that journalists, they go to tough places. This isn't one of those situations. They should have been safe.
"I think it's one more argument for why we need to look at how we can reduce gun violence in this country."
Vicki Gardner, who was being interviewed live on-air when a gunmen shot two journalists has been released from hospital.
In a 23-page fax, Vester Flanagan said he was a "human powder keg waiting to go boom" before he slayed Alison Parker and Adam Ward.
Police confirmed Vester Flanagan shot himself hours after killing two former colleagues Alison Parker and Adam Ward on live TV.