Video footage shows a gunman who opened fire at a rally for Donald Trump in Pennsylvania on a roof. The FBI says it is treating the incident as an assassination attempt. One bystander was killed ...

Law enforcement officials investigating the assassination attempt on Donald Trump told lawmakers ... on the roof of a ...

As seen in the video, Trump rally attendees noticed the gunman on the roof, and it shows what appears to be at least one law enforcement officer walking around the building, CNN reported.

Photos of the body of a possible shooter on a roof near the Trump rally appear to show the person wearing merchandise promoting one of YouTube's most popular channels devoted to firearms.

The U.S. Secret Service "should have had eyes" on the roof where an attempted assassin ... feels the weight of what happened" ...

Trump was grazed in the ear and a rally-goer was killed. In an interview with ABC News, Cheatle said: “That building in particular has a sloped roof at its highest point. And so, you know ...

Benjamin Maser, a 41-year-old welder who was listening to the rally from just outside the venue, said he saw a man standing on the roof of a building ... only learned that Trump had been shot ...

"They crawled up on the roof, they had their guns pointed at him, made sure he was dead," Greg said. "He was dead, and that was it. It was over." Shooter at Trump Rally Was on Building Adjacent to ...