The victims of the robbery were not injured during the break-in, police said.
Police units arrived at the house in the 100 block of McKinney Avenue at about 9:55 p.m. Sunday, according to a statement. The multiple victims then gave police an account of the robbery.
The victims said two people had knocked on their front door, but when one of the victims answered it, the two men forced their way into the house.
Both suspects were armed with handguns, police said. After stealing property from the home, the suspects fled in an unknown vehicle.
A third suspect entered the home during the robbery, but the victims could not see what that suspect looked like, police said.
The first suspect that the victims did see is described as an African-American man between 18 and 22 years old with a thin build. He was last seen wearing a black hooded jacket, black mask, and dark pants, police said.
The second suspect the victims saw is described as an African-American male between the ages of 16 and 20 who also has a thin build. He was last seen wearing a black hooded jacket, dark pants, and black Nike shoes, police said.
Pacifica police detectives are continuing to investigate the crime.