An armed man was arrested after allegedly conducting suspicious surveillance at Donald Trump’s golf course in California ahead of the US president’s visit, police said.

Trump, who has survived several assassination attempts, is set to attend a Republican National Committee dinner at Trump National Golf Club in Rancho Palos Verdes on Tuesday evening.

According to the Los Angeles County Sheriff’s Department, deputies detained a “suspicious individual” on Sunday after he was seen taking photographs and videos on the property and appeared to be “monitoring security-planning activities.”

The man, identified as Jeanine John Teale, had a 16-round magazine loaded with hollow-point ammunition in his pocket. A loaded pistol and another magazine were found in a vehicle parked near the golf course.

Deputies obtained a warrant to search Teale’s home in Downey, where they found additional firearms, including an illegally modified AR-platform rifle, as well as body armor and two radios. The department said “multiple notebooks containing concerning statements” were also discovered at the residence.

Teale was arrested on weapons charges, the department said, adding that the ongoing investigation could result in further charges.

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