Ottawa ( CNN ) Canadian counterterrorism officials arrested and charged a man Monday , accusing him of conspiring with twin brothers in a terror plot . The Royal Canadian Mounted Police announced Monday that it had arrested Suliman Mohamed , 21 , and charged him with participating in the activity of a terrorist group and conspiracy to participate in a terrorist activity . After making the arrest , Canada 's national security team said in a statement that Mohamed 's arrest was directly linked to the arrests of Ashton and Carlos Larmond , two Ottawa brothers accused of conspiring to commit terrorism offenses . The brothers were arrested Friday . The RCMP alleged Mohamed conspired to participate in terrorism with the Larmond brothers . `` These recent arrests underscore the reality that there are individuals in Ontario and in Canada who have become radicalized to a violent ideology , and who are willing to act upon it , '' wrote Chief Superintendent Jennifer Strachan , criminal operations officer for the Ontario Division of the RCMP . After an investigation dating back to at least August 2014 , the Larmond brothers , both 24 , were arrested Friday in two different locations . Ashton Larmond was arrested in Ottawa , but his brother Carlos was arrested at Montreal 's Pierre Elliott Trudeau International Airport , where police said he was intending to travel overseas for terrorist purposes . Carlos Larmond was charged with participation in the activity of a terrorist group and with attempting to leave Canada to participate in terrorist activity abroad , a relatively new Canadian terrorism law . Through their lawyer , the brothers indicated they would be fighting the charges . The RCMP statement did not give details of allegations against the suspects . `` I do n't think we 've been shown anything at this point , '' said Richard Addelman , the lawyer representing the Larmonds . It was not clear Monday night if Mohamed had retained an attorney . Canada 's terrorism laws were amended in April 2013 to include an offense for anyone leaving or attempting to leave Canada for the purpose of committing a terrorist act abroad . Very few Canadians have been charged in this way and the outcome of this case will be closely watched by counterterrorism officials . `` It 's going to be a significant case , that 's for sure , '' added Addelman . Neighbors in an east Ottawa neighborhood where Mohamed has lived said they did not immediately recognize him but indicated there had been police activity on the street all weekend long . Canada Parliament shooting : How it unfolded .
Suliman Mohamed accused of being part of a terror plot in Canada . The Canadian government has said it will not comment on the case until after an investigation is complete.