The club were also looking into claims the 32-year-old swore at supporters after conceding a second goal on what was his home debut in Sunday's 2-1 Barclays Premier League loss at St Mary's.
Reports suggested Saints had studied video evidence and decided Boruc had no case to answer, but they said in a statement: "Southampton Football Club can confirm that it is investigating allegations of an incident involving Artur Boruc that occurred towards the end of the first half during Sunday's match against Tottenham Hotspur."
The statement continued: "The club takes such allegations extremely seriously and will deal with the matter in the appropriate manner."
Source: PA
Source: PA