The incident happened Nov. 21 at the General Hospital of Salvatierra, located about 160 miles northwest of Mexico City.
In video footage obtained by Mexican news agency Aristegui Noticias, more than a half-dozen armed men can be seen entering a wing of the hospital and searching rooms while a member of the crew holds a security guard at gunpoint.
The gunmen -- described by the news outlet as "hitmen" -- are seen bringing the security guard to several rooms in search of a particular injured person. When the men eventually find their target, they remove him from the hospital on a stretcher.