Diego Martinez, 20, was arrested outside of his home in the 4700 block of Calle Solimar shortly after midnight, after two people -- a 47-year-old man and 49-year-old woman -- were found with gunshot wounds on the same street.Oceanside police officers obtained a search warrant and surrounded Martinez's home Thursday morning and neighbors were told to stay inside. At about 9:30 a.m., Martinez came out of the house and was taken into custody.Police said they received a call from a woman screaming for help shortly after midnight.Units responded to an area near the intersection of Calle Mariposa and Calle Solimar. Initial reports indicated that someone walked up to a truck where a man and women were sitting and opened fire.Police said they believe the shooting occurred in front of Martinez's home. The two victims drove a short distance before coming to a stop on the same street. It was at that location where the woman was able to call for help, according to police. The other victim knocked on a resident's door.One resident told 10News the male victim was "just crawling, begging for help. It sounded like he was swallowing a lot of blood." The 47-year-old man died at the scene and was found lying in a resident's driveway. The 49-year-old woman, who sustained wounds to the face, was transported to a hospital and is expected to survive."They shot my son and a good friend shot them in the chest, in the head," said Maria Robbins.Robbins told 10News the victims are her son, Robbie Robbins, and his girlfriend, Lisa Baget."I don't know who who did it. I don't know who [killed] my son ... He's my only son, my friend," Robbins added. Oceanside police did not release a motive for the shooting, and an investigation as to how Martinez and the victims are connected is ongoing. Police confirmed that they are not looking for any other suspects at this time.Neighbor Grace Montano said, "I [saw] Diego taken out of the house, which I was very surprised because as I know Diego, for the last five years that I lived here, he's been a hard worker, doesn't associate with the youngsters around here." When asked if Martinez may have had issues with the deceased man, Montano said, "No, I'm totally shocked, very, very shocked and especially ... would I think there's feuding between the two? No." Police said a rifle was recovered during the service of a search warrant. It is unknown if the gun was used in the incident.A neighbor told 10News, "Yeah, I am worried moved here three years ago and seeing this it's making me think it's not a good neighborhood to live here." Authorities did not officially release the names of the victims as of 6 p.m.Martinez was booked into the Vista Detention Facility on suspicion of first-degree murder and attempted first-degree murder, according to jail records. He was scheduled to be arraigned at 1:30 p.m. Tuesday.