( CNN ) -- Police in suburban Seattle said Tuesday they have not ruled out the possibility of foul play in the disappearance of a 2-year-old boy who was reported missing after being left alone in a car by his mother . According to police , Sky Metalwala 's mother said she ran out of gas in Bellevue , just east of Seattle , leaving the toddler in the car while she took her 4-year-old with her to get help . `` She told us that her son was asleep , and that 's why she chose to leave him in the car , because she could n't carry both kids to walk to the gas station , '' Maj. Mike Johnson of the Bellevue Police Department told CNN 's Brooke Baldwin . Julia Biryukova , the mother , said the young boy was gone when she returned to the vehicle about an hour later , according to police . `` At this point , foul play has not been ruled out , '' Johnson said , adding that neither the mother nor the boy 's father is a suspect . Police have no suspects , and no arrests have been made in the case . Other than the boy 's mother and his 4-year-old sister , no one has reported seeing the toddler in the past two weeks , according to police spokeswoman Carla Iafrate . She described the mother , who gave police permission to search around her home and car , as cooperative . The father , Solomon Metalwala , who is separated from Biryukova , took a polygraph test Monday and was expected to take another Tuesday after results of the first one were inconclusive , said Sgt . Seth Tyler of the Bellevue Police Department . He said the car door was unlocked when police got to it . Authorities began their search around the vicinity of the vehicle but found nothing . They are canvassing the mother 's apartment complex in Redmond , northeast of Bellevue , Tyler said . Search-and-rescue experts brought in to assist told police they do not believe the boy got out of the car and wandered off , according to Johnson . `` So we 're trying to look at other options , '' he said . Early indications suggest that the car still had some gas in it when it was left and that it would run , he said . However , police have not done a forensic examination of the vehicle . `` Our primary concern right now is to locate Sky , '' said Johnson . The toddler has brown eyes and short , dark hair and was wearing a dark green hooded sweatshirt and blue-and-gray striped pants when he was last seen . The boy 's parents , who separated last year , have a tumultuous relationship . Biryukova has said she feared for her safety and that of her children around Metalwala , according to court records . `` I am told by my husband Solomon ( and ) his family that if I take any action towards custody of our children he will take them out of the country ( and ) I will never see them again , '' she wrote . Metalwala responded , in court filings , that his wife suffered from mental health problems and was unable to care for the children on her own . Both parents were charged in 2009 with reckless endangerment for leaving then 3-month-old Sky alone in their parked car . Court records show they completed court-ordered parenting courses following the incident . CNN 's Patrick Oppmann and Deanna Proeller contributed to this report .
NEW : This means the product will ship as received by the manufacturer, sealed, with all advertised components, and with the manufacturer warranty. NEW : The boy 's parents were charged in 2009 for leaving him alone in their parked car . Police have no suspects in the case . Sky Metalwala , 2 , has brown eyes and short , dark hair .