PLEASANTON — Residents were urged to shelter-in-place due to a gas leak in the area, the Pleasanton Police Department said Saturday. Officials said the Livermore-Pleasanton Fire Department was working on a gas leak in the area of 4300 Dorman Ct. shortly after 10:00 a.m. Saturday and directed residents within a one block radius to shelter-in-place until further notice. The department issued the alert with a moderate severity, which is classified as a possible threat to life or property.