it was discovered yesterday. city officials say this has forced them to stop activity in the ocean and along the shoreline in that area, and as you mentioned, they also canceled the last day for the iconic annual pacific air show that normally draws thousands of people to the beach. the mayor says they're focused on two priorities right now. >> first, protecting the health and safety of our residents and visitors. and second, preventing an ecological disaster by mitigating the impacts of the oil on our precious wetlands and wildlife. >> reporter: authorities say the oil leaked from a broken pipeline connected to an offshore oil platform, but it's unclear what caused this issue with the pipeline. the ntsb is sending two investigators to look into the matter. city officials say beta offshore is responsible for this incident. >> the ramifications will extend further than the visible oil and