They did not immediately say what happened or why it prompted an investigation.
Jing Lu, 56, was ordered off the property by the club's private security officers, but she returned to take photos and the club called police to arrest her, according to The Palm Beach Post. When officers approached her, Lu "balled up her hands into fists, crossed her arms on her chest, began screaming "no, no, no" and pulling away from me", one officer wrote in the affidavit. It was determined she had an expired visa, Ogrodnick said. She was detained in Palm Beach County Prison on Wednesday evening.
Trump, who is expected to travel to the resort with his family for the holidays, was heading to MI for a campaign rally on Wednesday as the US House voted to impeach him.
The club was criticised for an apparent lack of security in April when Zhang Yujing, 33, was arrested after attempting to enter while carrying multiple mobile phones and a thumb drive containing malware.
Trump's spends a considerable amount of time at Mar-a-Lago and once referred to it as the "Southern White House".
In September, she was convicted of entering a restricted area and lying to a federal agent. She is being held for deportation.
A USA college student was also arrested after trespassing onto the property in November 2018.
In both of those cases, Trump and his family were staying at the resort, but none have been threatened.
US President Donald Trump's Mar-a-Lago estate is seen in Palm Beach, Florida, US, on November 27, 2019. The Trump family business doubled the initiation fee to $200,000 after the president was elected in 2016.
The latest Chinese intruder at President Donald Trump's Mar-a-Lago resort in Florida appeared in court Thursday, with a judge appointing a public defender as her lawyer and ordering that she remain in custody.