Luckily, they did not harm their hostages.
From the article:
An investigation found that the three robbers got into the house by breaking out a window. They then awakened the woman and two boys, 7 and 9, who were sleeping in an upstairs bedroom.
The older boy later told KOMO News, "They snuck into the house, and then they screamed, 'Hey!' and woke me up. And then they had a gun, and they told my nanny to be quiet and don't yell."
All three occupants were bound with duct tape and forced to remain in the bedroom while the suspects trashed the residence, looking for money, valuables and jewelry, Comstock said.
"It was pretty serious for the two boys," says a family friend, Duong, who only wanted her last name used. "I have no idea who would do this. ... We have nothing in the house to grab anyway."
As the robbers fled, the boys and their nanny said they could hear a car and a motorcycle leaving the scene. The victims were able to free themselves and call another family member who then notified police.