Arlene Foster has condemned those responsible for causing a security alert at her office in Enniskillen, Co Fermanagh.
A threat was made using a recognised code word resulting in the evacuation of the East Bridge Street office and surrounding properties in the area, the Finance Minister said.
She added: "Those behind this alert have not just disrupted the work of my constituency office but also many businesses in the centre of Enniskillen.
"It is right that for the safety of everyone the threat is taken seriously, but it has an impact on a large number of people on a busy working day.
Fermanagh: East Bridge Street in Enniskillen town centre is closed due to a security alert.— Trafficwatch NI (@TrafficwatchNI) December 4, 2015
"It is clear that those responsible have absolutely no regard for the people of Enniskillen or anywhere else as they use the failed tactics of intimidation and threat.
"I hope that the police can identify whoever is responsible for this and ensure they are brought to justice swiftly."
Inspector Christian Bradley added: "Police are currently in attendance at a security alert in the East Bridge Street area of Enniskillen following a report of a suspicious object.
"A number of properties have been evacuated and East Bridge Street and Queen Elizabeth Road have been closed to traffic. There are no further details at this time.”
Sinn Fein MLA Phil Flanagan said that the people who disrupted the town centre of Enniskillen have done nothing but attack the community going about Christmas shopping.
He added: "The threat of a bomb in the offices DUP MLA Arlene Foster is not only an attack on democracy but also against the entire community of Enniskillen.
“Everyone has a right to free speech and to express their politics free from threat or harassment and I hope that this incident doesn’t turn out to be more serious than it is.
“The Christmas period is the most important time of the year for small local businesses and this disruption has put these traders under pressure.
“Enniskillen is competing against other local towns and cities for Christmas trade and these threats do nothing in attracting people into the town.
“This attack on the office of Arlene Foster has done nothing but disrupt the entire community and those involved should get off the backs of all the people.”
Ulster Unionist MP Tom Elliott condemned the bomb threat as an attack on democracy.
Mr Elliott said: “I unreservedly condemn the threat at Arlene Foster’s office which caused great disruption in Enniskillen today.
“The targeting of anyone, including a politician or political party, is nothing then less than an attack on the democratic process itself and a bid to instil fear in the wider community. These tactics failed before and they will fail again.”