A masked man abducted a family of four and their friend from their Herndon apartment, robbed them, and left them in a remote area in Fairfax County Thursday night, police said.

Around 9:30 p.m., the father of the family dropped off his wife, teenage son, toddler and friend at the family’s San Moritz Circle apartment as he went to park the car, police said. 

The mother, teen and toddler went inside first, police said, and minutes later a masked man entered the apartment through the unlocked door and ordered them into a back room where he tied up the teen. The family friend went inside next and the suspect cut him with a sharp object when he did not immediately comply with orders to get to the ground, police said.

The father then entered the home and was also assaulted, police said.

The suspect implied he had a gun, but none of the victims saw the weapon, according to police.

The suspect ushered everyone out to the family sedan and ordered them to drive to a nearby ATM to withdraw money, police said.

The suspect then ordered the father into the trunk of the sedan and asked the family friend to drive to a secluded business park area off Innovation Drive, police said.

All the victims were released except the father, who was still in the trunk, and the suspect fled on foot, police said.

The victims ran and flagged down a passing bicyclist, who called the police. Once the father realized the suspect had left, he was able to escape the trunk, police said.

"The family was terrified, and this appears to be random," said Fairfax County police spokeswoman Lucy Caldwell. Police believe robbery was the suspect's motive for the abduction but did not release the amount the suspect took from the family, she said. 

The suspect is described as black, in his 30s, lean. He is about 5 feet 9 inches tall and wore a dark hat, a dark baggy sweat suit, black athletic shoes and dark cloth gloves, police said.