UPDATE @ 4:29 p.m.
Houston Police Chief Art Acevedo told media outlets they found no evidence of a shooter or gunshot victims at Ben Taub Hospital.
EARLIER
There were no immediate reports of injuries from the incident at the Ben Taub Hospital, reports of which started around 2 p.m., according to the AP.
Police in Houston are responding to reports of shots fired inside a hospital at a Houston hospital, according to the Associated Press.
Arial scenes shown in news broadcasts show that dozens of people are leaving the hospital, some appearing to be patients on gurneys, according to the AP.