A gunman opened fire at a fiber-optics company in Albuquerque, New Mexico, killing two people and wounding four before turning the gun on himself.
The 37-year-old gunman was a former employee of Emcore and the incident appeared to involve his girlfriend, says an AP report.
A person who confronted the shooter was found dead outside the building. Six others, including the gunman, were taken to University of New Mexico Hospital.
Emcore, a manufacturer based in Albuquerque, has about 700 full-time employees.