Tulsa police search for suspected lone gunman From Nick Valencia, CNN April 7, 2012 -- Updated 1723 GMT (0123 HKT) Police are working around the clock Three people were killed and two injured Police believe a lone gunman is responsible (CNN) -- Police in Tulsa, Oklahoma, were working around the clock Saturday to track a gunmen suspected of a series of shootings that left three dead and two critically injured. Tulsa police Capt. Jonathan Brooks said investigators were looking into whether the shootings may have been possible hate crimes. Officers were canvassing the neighborhood, he said. The two victims who survived told police that the suspect pulled up and asked for directions just before firing. He didn't use any racial slurs, which is typical in hate crime cases, Brooks said. According to police, on Friday, there were four locations where the five people were shot. All of the shootings happened within a mile of each other. The first reported shooting occurred at 1:03 a.m., Brooks said. Dannaer Fields, 49, died at the hospital. Three minutes later, another shooting was reported, with two victims. They are in critical condition but expected to survive, Brooks said. Just before 2 a.m., another fatal shooting victim was recovered. The third fatal victim was found around 8 a.m., but police suspect he had been shot much earlier, Brooks said. Police say they know that an older model white truck with some rust on it was seen at three of the crime scenes. They are currently investigating whether the same weapon, believed to be a small-caliber gun, was used in all of the attacks. The shootings happened in a predominantly residential neighborhood, considered a demographically diverse place, Brooks said.