San Diego,Calif - About 20 neo-Nazis held a rainy protest for two hours today outside an ACORN office, under the eye of at least 20 law officers, but no arrests were made, police said.

Protesters carried U.S. and Nazi flags, said National City police Sgt. Mike Harlan. The movement describes itself on its Web site as the largest white nationalist group in the nation.

There was no formal counter-protest, but four hecklers appeared for a short time. One man used a bullhorn for about five minutes, and later, three other three men stood in a parking lot and exchanged words with the group.

``It was very uneventful,'' Harlan said. ``I think the weather had a lot to do with it. Sometimes it was really pouring.''

Harlan said he alerted ACORN workers to the protest and was told they aren't in the office on Saturdays and did not plan to be there today.

ACORN -- which is an association of community organizations that work on behalf of the poor for voter registration, health care, housing and other social issues -- has been a target of conservatives and Republicans who claim the group takes government funds and engages in voter registration fraud.

ACORN officials note the organization has never been charged with a crime, and that it self-reported individual members who broke the rules during its voter registration drives.