Canadian Prime Minister Justin Trudeau said the federal government takes the internal review of immigration regarding a man and his son, who were recently accused in connection with an alleged failed terrorist plot in Toronto, "very seriously".

Trudeau said in statements to reporters on Monday: "It's clear this is a very serious situation, and the Minister of Public Safety is ensuring there is a full follow-up and understanding of how this exactly happened... I know that investigations are underway."

Last July, the Royal Canadian Mounted Police arrested Ahmad Fouad Mustafa Al-Didi (62 years old) and Mustafa Al-Didi (26 years old) in Richmond Hill, Ontario, and authorities found that the two—who the police initially understood to be Canadian citizens—were "in the advanced stages of planning a serious and violent attack in Toronto."

The two men face a series of terrorism-related charges, including conspiracy to commit murder on behalf of, at the direction of, or in association with the terrorist organization (ISIS).
Most of the charges stem from alleged activities carried out in Canada, but the father was also accused of committing aggravated assault abroad in June 2015 on behalf of the terrorist group.

When reporters asked him if the federal government knows more about how the father and son immigrated to Canada, Trudeau did not specify and said: "We continue an appropriate and comprehensive investigation into how this exactly happened; we will update Canadians in due course."

The House of Commons Public Safety and National Security Committee is holding a rare summer meeting today, Tuesday, to discuss a request to summon the Minister of Public Safety and the Minister of Immigration to answer questions regarding this issue.

Last week, the Conservatives called for hearings on how the two men were able to immigrate to Canada, and subsequently, the New Democratic Party supported the call to allow the emergency meeting to be held.