Dallas Mavericks assistant coach Darrell Armstrong was arrested Saturday and faces a charge of aggravated assault with a deadly weapon.

The Dallas Police Department confirmed the arrest Sunday. The Mavericks said in a statement that they had suspended an unidentified employee.

“The Dallas Mavericks are aware of an incident involving a member of our staff and are gathering all relevant information surrounding the incident,” the team said in a statement Sunday. “We take this matter seriously. The employee has been placed on administrative suspension pending the outcome of legal proceedings. … We will refrain from further comment while proceedings are ongoing.”

Armstrong, 56, is accused of hitting another individual with a gun and threatening to shoot that individual, whom television station WFAA in Dallas identified as a woman. Dallas police were responding to a call in the early hours of Saturday morning.

Armstrong has worked as an assistant coach for the Mavericks since 2009. His NBA playing career (1994-2008) totaled 840 games for the Orlando Magic, the then-New Orleans Hornets, Indiana Pacers, the then-New Jersey Nets and Mavericks.