Kyrie Irving: NBA Reviewing Alleged Party Videos ... While Absent From Nets

The NBA is looking into videos appearing to show Kyrie Irving partying at a nightclub without a mask -- all while he’s been MIA from his team.

The Brooklyn Nets superstar hasn’t played an NBA game since January 5. Tonight will be the 4th game he's missed. Neither BK or Kyrie have explained his absence ... outside of the team saying it was for personal reasons.

This is where the situation gets even stranger ... 'cause videos have now surfaced that seem to show a maskless Irving celebrating his sister's birthday with his family at a North New Jersey night spot this week.
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