An airplane lands at Noi Bai Airport of Hanoi.
The National Civil Aviation Security Committee said it has asked anti-terrorism authorities and police of Hanoi and the neighboring province of Vinh Phuc to carry out measures to prevent such threats.
The committee this month has received reports of green lasers being shone at four planes, including three airlines, as they approached Noi Bai.
The laser beams could potentially flash blind pilots during the critical landing and take-off phase of flight operations, it said.