Three of the five people killed Sunday when two planes collided near Brown Field Municipal Airport in Otay Mesa were employees of defense contractor BAE Systems, authorities said.

The company released this statement Monday:

“Yesterday, BAE Systems was notified that a small plane carrying three employees, and a contractor working on behalf of BAE Systems, collided with another small plane near Brown Field in San Diego County. Today, we can confirm that BAE Systems employees Carlos Palos, John Kovach and Jeff Percy were killed in that crash. The contractor, working for BAE Systems, was also killed. The BAE Systems twin-engine Saberliner was on a customer training mission. BAE Systems employees send their thoughts and prayers to the family members and co-workers of those killed. We are committed to supporting investigators as they work to understand how this collision occurred.”

The name of the only passenger of the smaller aircraft, a single-engine Cessna 172, has also not been released.

The cause of the crash is under investigation by the National Transportation Safety Board.

BAE is a publicly traded defense contractor based in the United Kingdom. The corporation operates a ship repair yard in Barrio Logan. It also produces image exploitation software in Rancho Bernardo.