National City Police are investigating how a 16-year-old girl and an 18-year-old man were left dead after a house party Friday night. "I heard sirens and a helicopter flying around in circles. Then, I saw flashing lights and a lot of policemen," said Jay Hernandez, who lives in National City. National City Police rushed to the 1800 block of East 17th Street around 11:35 p.m. in National City after they received numerous 911 calls that two teenagers were shot. "Last night, I was ripped out of my sleep with screaming that will never leave me. It was scary. I could hear the horror," said Lila Silva, a neighbor who heard the whole ordeal. MORE: https://www.cbs8.com/article/news/local/teenagers-shot-and-killed-during-national-city-house-party/509-59c8902c-3677-4425-b981-044d4db05495