Aubameyang, 32, played in his home nation's crucial 1-0 World Cup qualifier home win over Libya, a game in which he netted the only goal of the encounter with a 54th-minute penalty that kept Gabon's hopes alive of making it to Qatar 2022.
The setback now places the striker's presence for their clash with Liverpool in doubt.
There is now further doubt about his fitness after Gabon confirmed that he will miss this afternoon's (Tuesday) clash with Egypt.
Whilst he could well be suffering from something minor and missing the game as a precaution, with the exact problem still unknown, Arsenal management will be worried about their captain's availability moving forward.
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