Republican presidential candidate Donald Trump was safe after a shooting occurred near his golf course in Florida on Sunday, in what investigators see as an apparent assassination attempt against the former president.

The shooting took place shortly before 2 p.m. near Trump International Golf Club in West Palm Beach, where Trump was golfing. In a fundraising email, Trump said that he was "safe and well," according to CNN. His campaign and the US Secret Service also confirmed that he was safe.

The Federal Bureau of Investigation cast the incident as "what appears to be an attempted assassination" of the former president. A person has been taken into custody in connection with the shooting, according to investigation authorities.

The shooting came after Trump survived another assassination attempt during a campaign rally in July.

"There were gunshots in my vicinity, but before rumors start spiraling out of control, I wanted you to hear this first: I AM SAFE AND WELL!" Trump was quoted as saying in the email, according to CNN. "Nothing will slow me down. I will NEVER SURRENDER! I will always love you for supporting me."

The incident came in the midst of a hotly contested race for the White House between Trump and his Democratic rival, Vice President Kamala Harris. With the presidential election just seven weeks away, various polls have shown the two candidates in a tight race.

The White House said that President Joe Biden and the vice president have been briefed on the security incident.

"They are relieved to know that he is safe. They will be kept regularly updated by their team," the White House said in a statement.

The Secret Service said that a probe into the incident is under way.

"The Secret Service, in conjunction with the Palm Beach County Sheriff's Office, is investigating a protective incident involving former President Donald Trump that occurred shortly before 2 p.m.," Anthony Guglielmi, the Secret Service's chief of communications, wrote on X. "The former president is safe."

In a social media post, Sen. Lindsey Graham said Trump was in "good spirits."

"Just spoke with President Trump. He is one of the strongest people I've ever known," he wrote on X. "He's in good spirits and he is more resolved than ever to save our country."

On July 13, Trump was injured as a gunshot struck his ear during a campaign rally in Pennsylvania. The shooter was shot dead, while one spectator was killed. (Yonhap)