Police are calling for information after a "high-powered green laser" light was pointed at a Royal Flying Doctor Service (RFDS) plane landing in northern Western Australia.

The aircraft was attempting to land in Broome just after midnight on June 1 when the laser was shone into the cockpit, affecting the pilot and risking the lives of the patients and medical staff on board, police say.

No one was injured.

Broome Police officer in charge Courtney Solly said the pilot managed to manoeuvre the plane and land safely.

"The lasers can cause temporary blindness in the pilots, and they won't be able to see their instruments or gauges," Senior Sergeant Solly said.

"It is also dangerous for those on the ground; particularly during critical times such as take off and landing."

Senior Sergeant Solly said police are investigating the incident.

In a statement, the RFDS WA chief executive Judith Barker said all such laser incidents are reported to authorities.

"The RFDS takes laser incidents seriously and reports all cases to Air Traffic Control, who then report onto WA Police and other regulatory authorities," she said.

Pointing a laser at an aircraft carries a maximum penalty of up to seven years' jail.

Anyone with information on the incident should contact Broome Police.