Gunman kills security guard before being fatally shot at US psychiatric hospital

Police work at the scene of a shooting at New Hampshire Hospital (Geoff Forester/The Concord Monitor via AP)

A security guard has been gunned down in the US state of New Hampshire after an armed assailant entered the state’s only psychiatric hospital and opened fire.

Authorities confirmed security guard Bradley Haas, 63, was shot as he guarded the entrance to New Hampshire Hospital on Friday.