Immigration Minister Lena Diab is looking into why some people's citizenship documents were recalled.

Minister Diab did not say what caused the problem during a press conference.

She said she told her department to investigate as soon as she found out about the issue.

The department is reviewing all citizenship applications and not finalizing any new ones.

Minister Diab is taking the issue seriously and knows people are worried about their citizenship.

The emails were sent to a few dozen people who got citizenship through a new law.

Some people who received passports were told to give them back because they are no longer valid.

The department is reviewing all 4,100 successful citizenship claims under the new law.

Some people who were told to surrender their citizenship certificates were later told their citizenship was confirmed.

Minister Diab was asked what led to the review but did not give a specific answer.

People who received citizenship and moved to Canada can still work while the review is underway.

Minister Diab said the department will take the time it needs to review the issue and be clear with Canadians.

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