Via AFP:
A terminal at Milan's Malpensa airport was evacuated Monday when a man smashed his car into the terminal building and was shot by a police officer after trying to stab him, a security source said.
"A Tunisian man... who was in a car with his wife and three children tried to smash into the terminal," the source told AFP.
"He then got out of the car with a knife in his hand and threatened a police officer. The officer tried to calm him and escort him out of the terminal.
(source)
Update: Police rule out terrorism.