TOKYO - Three US military helicopters made emergency landings Thursday afternoon at a commercial airport in western Japan, local media reported.

The helicopters landed at around 2:30 pm local time at Takamatsu Airport in Kagawa Prefecture, public broadcaster NHK reported, citing the Japanese Defense Ministry.

Fire engines were dispatched to the site, but no water was sprayed, while no flames or smoke were visible around the helicopters, the report said.

There have been no reports of civilian aircraft being affected.

The ministry is currently investigating the cause of the incident.