VOLUSIA COUNTY, Fla. -- Investigators remain unsure how a married couple whose bodies were found near an SUV with their young children inside on New Year’s Eve died. 
 
 Daniel Kelsey, 32, and Heather Kelsey, 30, of Ormond Beach, Florida were found near the vehicle after a state trooper saw it parked on the side of a road around 2 a.m. Saturday, according to deputies. The car had no obvious signs of damage, and the couple’s three children, all between 8 months and 4 years old, were unharmed inside, Gary Davidson a spokesman for the Volusia County Sheriff’s Office told CBS News. 
 
 “There was no obvious signs of trauma that would immediately explain the cause of death or what happened,” Davidson said. 
 
 Investigators have not determined why the couple exited the vehicle, which was found with its hazard lights blinking, but Davidson said no signs of foul play have been detected. 
 
 He said an autopsy on the deceased couple has yet to be completed. 

 Updated: Jan 3, 2017 - 6:41 PM 
 
 DELAND, Fla. - Volusia County authorities are trying to figure out the circumstances surrounding the deaths of a husband and wife who were found outside their SUV on I-4 in DeLand while their three children were unharmed inside the vehicle. 
 
 Volusia County Sheriff Mike Chitwood said authorities are relying on autopsy results. 
 
 Heather Kelsey, 30, and her husband, Daniel Kelsey, 32, of Ormond Beach were found dead Saturday when a Florida Highway Patrol trooper spotted hazard lights on the couple’s SUV, authorities said. Daniel and Heather Kelsey 
 
 “Right now, it's in the hands of the medical examiner. We have everything we have, but to determine the cause of death is what we are waiting for, and we are expecting to get that in the next day or two," Chitwood said. 
 
 The couple’s three children, ranging in age from 8 months to 4 years old, were found in the SUV. 
 
 Investigators said there were no obvious signs of foul play. 
 
 Chitwood said the couple had a history of drug use, but Channel 9 did not find any arrest information in Volusia County. 
 
 “At first glance, the investigators feel it was an overdose based on what they see,” Chitwood said. 
 
 Family and friends described them as a loving and happy couple. 
 
 "It boggles me. I'm blown away by it. I don't want to believe it. We were real close," said friend Leigh Meekins. 
 
 The sheriff said the children are staying with family. 
 
 Chitwood said. 
 
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– A Florida Highway Patrol trooper spotted a car parked along the interstate with its hazard lights on around 1:30am Saturday and stopped to investigate. He found a couple dead on the side of the road nearby and their three children still strapped into their car seats, the Daytona Beach News-Journal reports. Authorities say the couple had a history of drug abuse, and it appears 32-year-old Daniel Kelsey may have died from an overdose. Questions remain about the cause of death for 30-year-old Heather Kelsey, and authorities are waiting on the results of an autopsy. The couple's three children—ages 2, 1, and an infant—were unharmed. Authorities don't believe the car had been on the side of road for longer than 30 minutes. The children are staying with relatives. There were no signs of foul play or trauma, though it remains unclear why Daniel and Heather Kelsey got out of the car before dying, CBS News reports. They had been married for nearly six years. "It boggles me," a family friend tells WFTV. "I'm blown away by it. I don't want to believe it."