Officials in Turkey say 113 arrest warrants have been issued in connection with the construction of buildings that collapsed in Monday's earthquake that has killed more more than 30,000 people.
Turkish police say they have already taken at least 12 people into custody, including building contractors.
More arrests are expected - but the action will be seen by many as an attempt to divert overall blame for the disaster.
President Tayyip Erdogan has admitted shortcomings in the response, but, during one visit to a disaster zone, he appeared to blame fate.
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