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A man who barricaded himself in a Texas hospital after becoming distraught over his son’s medical condition has surrendered, authorities said.

Police at first believed the man was holding hostages when they responded to the Tomball Regional Medical Center at 7 p.m. The Harris County Sheriff’s later said it was not a hostage situation, and negotiators were trying to convince the man to leave his son’t hospital room, which is in the hospital’s critical care unit.

The man’s identity was not immediately released. He surrendered at around 10:45 p.m. The man was not armed, the sheriff’s office said. Harris County sheriff's Lt. Joe Ambriz said the father became upset over his son’s condition and made threatening comments, but Ambriz did not go into more detail. Tomball is about 30 miles north of Houston.