SANTEE, Calif. (CNS) – A man and woman were in custody Tuesday morning, suspected of pointing a gun at demonstrators from their truck in Santee.

Witnesses say they waved a Mexican flag and shouted at the gathering as they drove past a group displaying an American flag, but officials did not comment on what either group was doing before the confrontation.

The protesters were at the intersection of Cuyamaca Street and Mission Gorge Road Monday and told authorities a woman in a black Dodge Ram truck going westbound on Mission Gorge pointed a black gun at them, Sgt. Ashley Lewis of the San Diego County Sheriff’s Department confirmed.

A viewer sent video to FOX 5, saying that it showed part of the incident. The clip shows a group standing near the street corner at the end of a strip mall parking lot, displaying an American flag and a Gadsden flag, with the text “Don’t Tread on Me.”

A truck matching the vehicle’s description, with a woman hanging out of the window waving a Mexican flag, speeds past the protesters. A person can be heard shouting, “F— white supremacists,” as the Dodge drives past, but the clip does not clearly show a weapon.

Warning: Coarse language

FOX 5 has reached out to the sheriff’s department to comment on the video.

A deputy eventually stopped a truck matching the callers’ description and detained three people inside, including a young child, according to Sgt. Lewis. A curbside line-up was conducted and the woman was positively identified as the suspect.

A search of the vehicle turned up a semi-automatic handgun with two loaded magazines. The gun was registered to the man driving the truck. Both adults were arrested on suspicion of child endangerment and exhibiting a firearm, Lewis said.

The status of the child was not disclosed.

The names of the suspects were not immediately available.