Pakistan International Airlines (PIA) on Thursday tweeted through its official Twitter account that the mother and 'unconscious' baby onboard its flight PK750, whose airconditioning had reportedly stopped working, are both doing well.

The national carrier's tweet states: "The CEO PIA sent his representative to meet with the family and also called to find out about their welfare. The inquiry for the incident is underway. Our passengers are important to us."

A video of a baby who had allegedly fallen unconscious due to faulty air conditioning on a PIA flight was shared on social media and TV channels on Wednesday, prompting the national carrier's spokesperson to take notice.

The video showed a woman — presumed to be the mother of the infant — yelling at PIA crew members to open the plane's door while pointing at the baby who was being held by a male passenger. The PIA staff can be seen telling the woman to wait, with one male official saying: "[sic] would have opened the door ... [we are] talking to the pilot".

The other passengers can also be heard demanding for the door to be opened, with some of them fanning the baby and others chanting "shame" at the officials.

When contacted by Dawn.com on Wednesday, PIA spokesman Mashood Tajwar had said: "PIA has taken notice of the video and has launched an investigation to find out which flight and crew members are shown in the video."

"Some people on the media are reporting that the incident took place on August 1, some are saying on August 3 — we have yet to confirm exactly which flight and date it was." He also added that there has been no official complaint registered with PIA regarding this incident.