'We're Ready to Take Off, and We Hear a Big Boom'

A man on a plane that was scheduled to depart just after another plane crashed while landing at San Francisco International Airport, killing two people and injuring dozens more, said the crash was sudden and caused a "big boom."

Asiana Airlines Flight 214, which originated in Shanghai, China,  with a stop in Seoul, South Korea, crashed just before 11:30 a.m. Saturday as it landed at SFO.

Alex Rodriguez, 38, of Port Hueneme, Calif., was on United Airlines flight 885, which was scheduled to depart just after the Asiana Airlines flight landed.

"We're there, we're ready to take off and suddenly [there is] a big boom, and next thing you see is just the parts of the airplane nearby our flight," Rodriguez said. 

"You see a lot of smoke coming out. A couple of minutes after you hear a small explosion, [which] is the engine catching on fire," he said.

The flight crew then walked through the plane to check on the passengers, he said.

No one was allowed off the United flight for nearly three hours, leaving Rodriguez and the other passengers to watch the aftermath of the crash.

Rodriguez said some people on the plane exited via emergency slides.

Emergency officials said at a 5:30 p.m. news conference at SFO that one person remained unaccounted for, while two were confirmed dead. Additionally, 132 suffered minor to moderate injuries, and 123 were uninjured.

The FBI said at the Saturday evening news conference that there was no evidence that terrorism was involved with the crash.