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(CNN) – The FBI is on alert after shots were fired in and near Canada's Parliament building Wednesday.
A member of the Canadian Armed Forces is dead, along with one gunman, and police in Canada are not ruling out more suspects.
This is the second time this week that the Canadian military became a target. On Monday, suspected ISIS supporter Martin Rouleau ran a car into two Canadian soldiers in Quebec, killing one.
Police say Rouleau is one of dozens of Canadians suspected of being radicalized. His passport had recently been confiscated.
"We were working him along with other suspects and we need to let the investigation now proceed," RCMP commissioner Bob Paulson said Tuesday.
Last year, Canada's rail system was threatened. Police charged two men with conspiracy to commit a terrorist act on the trains.
"The individuals were receiving support from al Qaeda elements located in Iran,"RCMP assistant commissioner James Malizi said last April.
Luckily that plot was foiled.
While investigations into today's attacks are ongoing, Canada's involvement in the coalition fight against ISIS does make the country a bigger target.
Meanwhile, its ability to defend against attacks is something the nation's own deputy director of security intelligence recently expressed doubt about.
"I'd be foolhardy to say we have all the bases covered. We do what we can with the budget we have," said CSIS deputy director of operations Jeff Yaworski.