A man, accompanied by a woman, gave a Nazi salute Friday morning on the Millstone Campus in St. Louis County, before trying to enter the St. Louis Holocaust Museum and Learning Center an hour before it opened at 9:30 a.m., according to police.

When he told a security guard standing outside the museum he was carrying a “concealed weapon,” the guard told him he needed to put the weapon back in his car, according to police. He then left with his friend.

Once alerted, St. Louis County police reviewed footage of the couple approaching the museum and noticed the salute. They also saw the two had also been videotaping the campus, where the museum and a number of other Jewish organizations are located.

The police have filed a peace disturbance report and have notified the FBI in case the couple were planning a future attack, according to Shawn McGuire, a public information officer for the county police.

“They may have bad intentions,” said McGuire. “They may just be immature, weird people, but we just can’t take anything lightly.”

The couple were driving a silver and black SUV, according to the police. The male suspect was described as 6-foot-1-inch, white, weighing about 250 pounds with short-cropped brown hair. The other suspect is a white female, weighing more than 170 pounds with a red or brown ponytail.

In addition to asking the guard why he couldn’t carry a gun into the building, the male suspect also asked whether you had to be Jewish to enter, McGuire said.

The police will conduct extra patrols of the campus and continue to search for the suspects, McGuire added.

The incident came a week after Saul Mirowitz Jewish Community School in Creve Coeur received a bomb threat over the phone and evacuated the building. Federation President and CEO Andrew Rehfeld said the incidents were alarming, but “a fact of today’s situation.”

“In both cases, nothing happened and in both cases our community responded in a way that was best practices to keep people secure, and we will continue to do that,” Rehfeld said. “The vast majority of these threats are just that, to create a fear response rather than simply to harm people.”

After the incident, the Federation sent out an alert to the various local Jewish organizations and institutions.

“We are very aware of the situational politics and everything that goes on,” Rehfeld said. “And we are here to keep the community secure.”