The director at Precious Moments Learning Center told Eyewitness News a man with a gun walked into the location on Langley Road.
Houston police responded to the incident around 8:29 p.m.
Daycare director Encarsadenia Perry said the gun was visible in his waistband, but he never took it out. He said a few things and turned around and left, she said.
At the time, there were about 20 children at the daycare, which is open 24 hours.
No one was hurt.
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