NEW: Italy has released Iranian businessman Mohammad Abedini from prison, following the release of Italian journalist Cecilia Sala from Tehran in a deal with Donald Trump. 

Abedini, wanted by the US for allegedly exporting drone navigation systems to Iran, was released in Milan after Sala returned to her country. 

Several days passed between Iran's release of Sala and Abedini's, with Italy trying to avoid the appearance of a direct prisoner swap.

Source: WSJ