DUP MLA Christopher Stalford has reported a man to police over a social media post in which he said he would attack the south Belfast representative with acid.
In aftermath of Brexit Party leader Nigel Farage being targeted with a milkshake on Monday, Mr Stalford suggested those attacking politicians would soon begin using more noxious substances.
"Today milkshakes, tomorrow acid," the DUP representative tweeted.
However, another Twitter user quoted Mr Stalford's post and said he was offering £100 to the first person to "milkshake Christopher Stalford".
Another user responded by tweeting that he would accept £150 for attacking the DUP MLA with acid.
Mr Stalford later tweeted that he had reported the man to the PSNI.
A DUP spokesman said: "The levels of abuse directed to representatives is deeply concerning.
"Threats and abuse to anyone is unacceptable and it must be treated seriously."
A PSNI spokesman said: "Police are aware of comments made on a social media platform. Enquiries are continuing."