Four Vallejo residents, including two juveniles, were arrested Sunday afternoon on suspicion of armed robbery, police said.
The victim, a Hayward man, was visiting Vallejo for a family event, police said.
At about 4:20 p.m., he was walking in the unit block of Valle Vista Avenue when a car pulled up and four people exited and surrounded him, police said.
One brandished a gun and demanded his personal belongings. They left the scene in the car with the victim's wallet and cellphone, police said.
For more on the story, see the Vallejo Times-Herald at www.timesheraldonline.com/news/ci_23129571