The RCMP have arrested a third suspect in a growing sweep against an alleged terror cell plotting attacks on Canadian soil. Khuram Sher, a Canadian-born physician and graduate of McGill University, was picked up early Thursday as part of “Project Samosa.” Curiously enough, Sher appears to have once auditioned for Canadian Idol, where he performed an off-key rendition of Avril Lavigne’s “Complicated.” The two other suspects, Misbahuddin Ahmed and Hiva Ali Zadeb, were picked up in Ottawa on Wednesday. Security officials say “homegrown Islamist extremism” has become Canada’s primary security concern. “Young Canadians are being radicalized to an extremist ideology and want to support that ideology with violence,” A. Comm. Michaud, the head of National Security Criminal Investigations, told the National Post.