A Jordanian policeman has shot dead two American instructors and a South African at a police training centre outside Amman, officials say.
Government spokesman Mohammad Momani said the assailant wounded two other Americans and four Jordanians, before being killed by his fellow officers.
Jordanian security sources earlier said that the gunman had killed himself.
The US-funded Jordan International Police Training Centre (JIPTC) hosts mainly Palestinian and Iraqi officers.
US contractors are sent to the facility in Muwaqqar, on the eastern outskirts of Amman, to assist Jordanian police trainers.
The US and South African embassies have so far not commented on the incident.