The Canada Border Services Agency has denied entry to dozens of senior Iranian regime officials and is investigating about 100 people with status in Canada for potential ties to Tehran.

The agency also has referred the cases of nine individuals with status in Canada to the Immigration and Refugee Board to determine their admissibility to Canada.

The denials at the border and the investigations stem from a measure the Liberal government adopted last year in the midst of widespread protests in Iran over the death of Mahsa Amini, a 22-year-old Kurdish-Iranian woman. Amini died while in the custody of Iran’s “morality police.”