One shot was fired at St. John’s University in Queens Wednesday afternoon in what appeared to be a robbery, the NYPD and university public safety said.

Police said three people entered the residence building Hollis Hall just before 2 p.m., where there was a dispute with four other people. One shot was fired, but no one was injured, cops said.

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According to an alert sent out by the university, the three men attempted to take cash from a student.

There are three people in custody, police said.

"Safety is a top priority at St. John’s, and at this time, there is no continuing threat to the campus community," the university said in a statement. "The University is working closely with the NYPD, which is continuing its investigation at this time."