April 17, 2015 5:50 pm Explosion in Fresno Sends Fireball into Sky Between nine to 14 people were injured when a county worker struck a gas line sparking a giant explosion in Fresno. Conan Nolan reports for NBC4 News at 5 p.m. Friday, April 17, 2015. US & World Videos 3:28 Adopt-a-Family events spread holiday cheer to those in need 1:01 Riverside County residents spot possible drones 0:56 Custom license plate wasn't mocking Oct. 7 attack, family says 2:00 Temecula residents capture possible drone sightings 1:19 Stabbing investigation at liquor store in Hawthorne