PLANO - Employees at an office building in Plano sheltered in place and called police Sunday morning after hearing gunshots.

When Plano police arrived at NTT Data around 6:30 a.m., at Custer and Plano Parkway, they saw bullet holes inside and were able to locate the suspect. Police took the suspect into custody and a rifle was recovered.

The suspect has been identified as 32-year-old Christoper James Frazier from Garland.

Frazier is currently in the Collin County Detention Center and is charged with assault causing bodily injury, deadly conduct discharge firearm, possession of marijuana and unlawfully carrying a weapon.

At this time police believe he is the only suspect. Authorities did a sweep of the building to make sure everyone was fine and that there were no other suspects.

No injuries have been reported.

Frazier is not an employee of NTT Data but does have access to the facility. The motive behind the shooting is still under investigation but police say this is an isolated incident.

Police say the office took part in a free work-place training course on what to do if there is an active shooter awhile back.