Turkish fighter jets violated Greek air space for the second time in as many days Tuesday, fueling concern in military and diplomatic circles.

Just after 8 a.m. two Turkish F-16s entered the Athens Flight Information Region between Lesvos and Chios and flew over the islet of Oinousses.

About an hour later, one Turkish F-16 entered the same area of Greek air space and also flew over Oinousses.

In both cases, the Turkish jets were chased off by Greek aircraft.