A series of threats have been made targeting senior Sinn Fein members ahead of the election.
Deputy First Minister Martin McGuinness’s home was paint bombed while party president Gerry Adams was warned that a bomb had been left at his family home in west Belfast, but police found nothing untoward.
Officers have stepped up patrols targeting dissidents opposed to the peace process and the danger to the security forces is rated as severe.
Mr Adams said: “In recent weeks there has been a concerted series of threats and attacks on the homes of Sinn Fein members.
“There can be no place for these type of actions nor will they deter Sinn Fein from working to advance the peace process and advance our political objectives.
“Sinn Fein will not be intimidated.”
It follows an upsurge in attacks and threats against Sinn Fein figures that the party blames on dissident republicans.
Mr McGuinness said: “It was also an attack on the wider democratic process coming just a day before the Westminster election, carried out by so-called dissident republican elements.”