KINGWOOD, Texas -

A mother and her four children were terrorized inside their home for thirty minutes as robbers went room to room looking for jewelry and cash. 

It happened Friday around 11 a.m. in the 21000 block of Whispering Forest Drive in the Kings Manor subdivision in Kingwood.

The victims said there were four armed robbers, one of them posed as a postal worker and forced his way in. Three other suspects followed. 

"The guy said there was a mail delivery," said Syed Shah, the victim's husband, who was at work when the crime occurred. 

"She just opened the door and he slammed it on her. They punched her, dragged her to the kitchen area and tied up both her hands and both her legs and asked her to put her face down on the floor."

His wife, Sajida, said the suspect who rang her doorbell had on a blue shirt and name tag with a U.S. mail logo on it.

The suspect tied her and her 13-year-old son up. The couple's 11-year-old daughter and two other children, ages 4 and 2, were not harmed. 

Once the robbers left the 11-year-old called her dad then dialed 911. 

"I was targeted, yes," said Shah.  He believes the suspects handpicked his family because he owns a gas station nearby and knew he wouldn't be home. 

His wife said two days earlier the same man came to their door and tried to deliver a different package but she told him it was the wrong address. The family believes the men may have been casing the place. 

"These guys been doing this," said Shah, who hopes police catch the crooks soon.  "There were four guys, they were armed.  All of them had guns."

The Montgomery County Sheriff’s Office Major Crimes Unit and Crime Scene Investigators were called to the scene and are now investigating. 

They're working with Crime Stoppers and ask anyone with information to call 800-392-STOP (7867). Anonymous tips can also be made through the Montgomery County Crime Stopper.