"We're all kind of nervous," said Capt. Kevin Joffer, district commander of the Highway Patrol at Sioux Falls. "You wonder if maybe something else will come out of this, which potentially could happen."

South Dakota law allows people with permits to carry concealed weapons nearly everywhere except bars, courthouses and the Capitol. Violators face up to one year in jail and $2,000 fines.

Motorcycle gang members carrying concealed handguns are stopped daily during the Sturgis Motorcycle Rally, which draws throngs of bikers and others to the Black Hills each August, Joffer said.

Nearly all those stopped have the necessary permits that allow them to carry hidden handguns, he added.

Statistics so far during rally week, which began Monday, seem to bear that out. Although several hundred thousand bikers have converged on Sturgis, just 11 people have been arrested for concealed weapons violations, said Capt. Randy Hartley, Highway Patrol district commander at Rapid City.

Authorities have arrested two men affiliated with the Hells Angels for opening fire on several Outlaws at Legion Lake Resort on Tuesday. Five Outlaws were struck by bullets and one of them suffered an undisclosed injury.

Authorities said they would not be surprised by retaliation.

Joffer said a state trooper stopped 10 or so Outlaws motorcycle gang members Thursday night on Interstate 90 near Plankinton because of traffic violations. Backup officers were called only because of the large number of vehicles that were stopped, he said.

"One of my sergeants discovered very early on that they were heavily armed, which means probably everybody was armed. There were no problems. They were all polite to him. He did call for some additional backup just to have there because he had multiple people stopped."

Joffer said some of the Outlaws were given traffic tickets, but all of the bikers had permits to carry concealed weapons and they were allowed to continue their trip to Sturgis.

Those who carry hidden handguns must have their permits in possession.

People do not need permits to carry concealed weapons on their own property or property they rent.

In exchange for the same consideration, South Dakota honors concealed weapons permits with 16 states: Alabama, Alaska, Arizona, Idaho, Indiana, Kentucky, Michigan, Mississippi, Montana, North Carolina, North Dakota, Oklahoma, Tennessee, Texas, Utah and Wyoming.

Copyright 2006 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.