A Metro bus driver was injured Sunday night in downtown Washington when gunfire broke out near the arena where a Wizards basketball game was underway, according to authorities.

       The driver of a bus on the 70 route suffered minor injuries from broken glass about 6:30 p.m. when the bus was hit near Seventh and H streets NW, said Metro spokeswoman Sherri Ly. The game in Capital One Arena started at 6 p.m.

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       Ly said the glass shattered when the bus was struck by a stray bullet. The driver was treated at the scene, she said.

       There were apparently no other injuries in the incident, according to a spokesman for the D.C. fire department. The spokesman said rescue personnel were sent to the area in response to a report of shots being fired.

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       During the first half of the game, an announcement was made in the arena to alert fans to unspecified “police activity” outside the building. A representative for the team could provide no further information.

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       A Twitter message from Monumental Sports & Entertainment, the team’s ownership group, said there was police activity “outside the arena” but no cause for alarm. A later tweet said fans leaving the game should be prepared to walk around the activity.

       The arena is between Sixth and Seventh streets, extending north from F Street. Its address is 601 F Street.

       The reason for the gunfire could not be determined.

       The Wizards lost to Philadelphia, 117-96.