Earlier, Trump demanded that the DOJ investigate claims that federal authorities surveilled his campaign for political purposes. Writing on Twitter, the president said he also wanted to know if any “demands or requests were made by people within the Obama Administration.”

READ MORE: Trump demands official DOJ probe into FBI ‘infiltration’ of campaign team

The department asked the inspector general to liase with federal prosecutors to bring charges against FBI personnel found guilty of criminal conduct while investigating allegations of collusion between the Trump campaign and Russia.

Deputy Attorney General Rod Rosenstein warned that his department would take “appropriate action” if the FISA review uncovers any wrongdoing. “If anyone did infiltrate or surveil participants in a presidential campaign for inappropriate purposes, we need to know about it and take appropriate action," Rosenstein said in a statement.

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