Search on for mother who disappeared from front yard of her home

A desperate search was on today for a Virginia mother who mysteriously vanished on Tuesday when she walked out into her front yard, leaving two young children she planned to take to daycare inside her house, authorities said.

TerriLynn St. John, 23, was reported missing Tuesday morning when she didn't show up for work, according to officials. She was last heard from about 7:30 a.m., according Maj. Michael Samson of the Middlesex County Sheriff's Office.

St. John's father went to the house in Wake, Virginia, after learning from his daughter's coworkers that she never made it to work, Samson said at a news conference today.

"He went over there and he found the door open, saw the children were alone and subsequently called the sheriff's office," Samson said, adding that the children were not injured.

St. John, who recently moved to Wake, had planned to drop her children off at daycare before heading to work, Samson said.

Her car found was parked in the driveway.

"This is a missing person, under suspicious circumstances," Samson said, adding that it was too early in the investigation to call the case an abduction.

Deputies searched the property and found St. John's cell phone in bushes outside the house and a broken necklace was discovered in the yard of the home, officials told ABC station WRIC in Richmond, Virginia.

Samson said investigators have interviewed several persons of interest, adding that each cooperated and submitted DNA samples that are being analyzed in a crime lab. He declined to identified them.

"A person of interest could be acquaintances, whether they be personal acquaintances - friends, family," Sampson said. "Miss St. John had a boyfriend at the time. He is obviously a person of interest."

The sheriff's office launched a search of the area within two hours of St. John's disappearance being reported, using air surveillance and search dogs.

St. Johns's children were placed in the custody of her father, Samson said.

The missing woman is described as 5-feet-6-inches tall, about 130 pounds and has blonde hair and blue eyes. She has the letters "R.J.M." tattooed on her right wrist, a princess crown on her left wrist, and a cross on her ring finger.