Ten people have been arrested and warrants for six others have been issued in eight brutal home-invasion robberies that have occurred in Fairfax County since January, police announced yesterday.

"We could not have done this without the cooperation of the Asian community," said police spokesman Warren Carmichael. "The victims showed great courage in coming forward."

The most recent arrest occurred on June 20 in Chicago, and police said the delay in announcing the arrests underscores the difficulty in investigating the suburban terrorists who rove around the country in loosely formed gangs.

Gang members, most of whom are reportedly Vietnamese, forced their way into homes in the Asian community, tie up family members and either threaten or beat them until cash, jewelry and other valuables are relinquished.

The bandits often threaten victims, saying they would retaliate if police are summoned. They prey on victims who are generally skeptical of police agencies, primarily because of experiences with corruption in their homeland and because of unfamiliarity with the court system.

In the past, community leaders said, many home invasions were not reported to police because of fears of retaliation. In cases that were reported, witnesses often refused to testify.

Since the recent rash of home-invasion robberies in the county, which occurred in Springfield, Annandale and the Falls Church areas, law enforcement officials have been working with the Asian community to break down the cultural barriers.

"We have more confidence in police now," Nguyen Ngoc Lieu, president of the Vietnamese Parents Association, said yesterday after learning of the arrests. "I think there will be more cooperation."

Lieu credited Rep. Frank R. Wolf (R-Va.) with acting as a liaison between police and the Asian community. Last month, community leaders gathered in the Falls Church City Council Chamber for a course in the American criminal justice system.

Fairfax police said they were able to make the arrests only with the help of numerous agencies, including Montgomery and Henrico county police departments, the Chicago Asian Gang Task Force, the Jade Squad of the New York City Police Department, the Westminster (Calif.) Police Department and the FBI.

The 10 arrested so far include: Bao Doan, 21; Kinh Luan Duc Dao, 22; Vu Duc Dao, 20; Xuan Duc Ho, 21; and Mike Phoung, 20. None of the five, who are being held at the county jail, has fixed addresses, police said.

Police said the five men, plus four others charged in outstanding warrants, are suspected of committing two home-invasion robberies in Springfield in January, two in Annandale in February and March and another in Fairfax in March.

In another home invasion in Annandale in March, police charged Xu Pei Gao, 21, and Kai Chang, 19. Both men, who have no fixed addresses, were arrested in New York, police said.

Hui Ngoc Le, 28, and Non Nguyen, 40, both of Falls Church, and Thuy T. Turnbow, 39, of Vienna, were arrested in a Feb. 24 home invasion in the Falls Church area. There are six outstanding warrants, and more arrests are expected, police said.

Each of those arrested has been charged with robbery, burglary while armed and use of a firearm.

Because home-invasion robbers generate such fear in their victims, Fairfax police took the unusual step of not releasing block numbers of victims as an added protection. In cases that have progressed to court, some victims have been threatened before testifying.

Hai Quach, who walked into his Falls Church home in February to find a man pointing a gun at him and his family tied up with appliance cords, said yesterday that he will not be intimidated and will help prosecutors in his case.

"I'm happy to hear that," Quach said of the arrests. "They {police} did very well."