flight MH370
A relative of a passenger onboard Malaysia Airlines flight MH370 cries at the Beijing Capital International Airport in Beijing March 8, 2014. Reuters

As search continues for a Malaysia Airlines plane that vanished with 239 people on board, people around the world are voicing anguish and frustration over the incident.

Malaysia Airlines flight MH370 that went missing en route from Kuala Lumpur to Beijing, had passengers from 14 nations, majority of them Chinese.

Many took to Facebook and Twitter to express their shock, and also offer goodwill and support to the victims and their families.

This whole Malaysia Airlines flight thing is crazy. I'm already scared of flying that doesn't help.

— Andrea (@AndreaKoeln) March 8, 2014

Malaysia Airlines says its jet which has been missing for 15 hours now hasn't born found yet. Let's hope for a miracle.

— nelson cid (@nelcid) March 8, 2014

Oh my... Praying they'll at least find out what happened. Hoping for miracle. Search launched for Malaysian airliner http://t.co/Hj2e5gLKHn

— Jenefer R Jones (@jhenpony) March 8, 2014

The mystery of the plane's disappearance heightened as the pilots of the flight had not reported any problems with the aircraft.

"The aircraft had not been at altitude long and that strikes me as very, very odd," aviation expert Captain JF Joseph, who has 44 years flying of experience, told TIME.

"It's too early to say if there was a bomb or terrorist activity, but it lost contact just as it began to level off at 35,000 ft. It would give some indication that what occurred was catastrophic or somewhat instantaneous."