A number of alerts saw Belfast Metropolitan College’s Titanic Quarter and Millfield campuses evacuated, as well as the Strule Arts Centre in Omagh and the Waterfoot Hotel in Londonderry. Roads around the Titanic Quarter building later reopened, while those in Millfield remain closed.
Mr Dickson said the alerts were a “co-ordinated assault on the rule of law”.
“These incidents do nothing but cause unnecessary disruption for everyone, while attempting to bring fear back to our streets. Only last night we saw the positive side of our society, when people took to the streets in a joyful manner to celebrate fantastic results for the Northern Ireland and Republic of Ireland football teams.
“Now we see the ugly side of Northern Ireland, which sadly all too often is the side which hits the headlines. To say I am disgusted at those behind these orchestrated alerts is an understatement – they must be condemned in the strongest possible terms.
“I would urge anyone with information on them to contact the police as soon as possible.”