Trump holds campaign rally in Butler
Trump holds campaign rally in ButlerREUTERS/Brendan McDermid

Authorities in Arizona on Thursday arrested a man in connection with an alleged social media threat to kill former US President Donald Trump.

The man, Ronald Lee Syvrud, 66, was taken into custody in Arizona, according the Cochise County Sheriff's Office.

He was wanted for what was described as "suspicious activity".

"Syvrud is being sought as an investigative lead for threats to kill a presidential candidate," the sheriff's office stated in a press release shared on Facebook.

Although the sheriff's office did not disclose the name of the candidate targeted by the threats, two sources informed ABC News that the alleged social media threat was directed at Trump.

Trump had planned to visit the US-Mexico border in Cochise County on Thursday.

The former President survived an assassination attempt during a rally in Butler, Pennsylvania last month

On Wednesday, Trump held an outdoor rally in Asheboro, North Carolina, his first in which bulletproof glass panels were used, following the assassination attempt against him.