Full pictures from Flight MH17 Malaysia Airline Crash (GRAPHIC IMAGES)

We all have heard of  the Malaysia Airlines flight carrying 298 passengers that crashed in eastern Ukraine on Thursday while traveling from Amsterdam to Kuala Lumpur. An adviser to Ukraine's Interior Minister wrote on Facebook that the plane was shot down, the Associated Press reports. A group that's part of the Ukrainian resistance movement posted a video that allegedly shows the site of the crash. See full images of the wreckage below.

WARNING: VIEWERS DISCRETION IS SERIOUSLY ADVISED. CONTAINS VERY GRAPHIC IMAGES

AIDS Conference Attendees on Downed Malaysian Jet

World-renowned AIDS researchers and activists heading to an AIDS conference in Australia were on the Malaysian jetliner shot down over Ukraine, officials said Friday, news that sparked an outpouring of grief across the global scientific community.

Unconfirmed reports said up to 100 passengers were going to the Victoria state capital of Melbourne to attend the 20th International AIDS conference, which starts Sunday, Victoria Premier Denis Napthine said, though he hastened to add that reports were conflicting and it was far too premature to give a precise figure.

"There's been confirmed a number of senior people who were coming out here who were researchers, who were medical scientists, doctors, people who've been to the forefront of dealing with AIDS across the world," Napthine told reporters in Melbourne. "The exact number is not yet known, but there is no doubt it's a substantial number."

The plane, which was flying from Amsterdam to Kuala Lumpur, Malaysia, crashed Thursday with 298 people on board. American intelligence authorities believe a surface-to-air missile brought down the aircraft, but it was not yet clear who fired it.

Among the passengers was former president of the International AIDS Society Joep Lange, a well-known researcher from the Netherlands, opposition leader Bill Shorten said in parliament.

"There are Australians who would have planned to be at the airport tomorrow night to greet friends and family — amongst them, some of the world's leading AIDS experts," Shorten said. "The cost of this will be felt in many parts of the world."

Chris Beyrer, president-elect of the International AIDS Society, said if reports of Lange's death were true, "then the HIV/AIDS movement has truly lost a giant."

Nobel laureate Dr. Francoise Barre-Sinoussi, co-discoverer of the AIDS virus and president of the International AIDS Society, paid tribute to Lange in a speech in the Australian capital, Canberra.

"Joep was a wonderful person — a great professional ... but more than that, a wonderful human being," she said. "If it is confirmed, it will be a terrible loss for all of us. I have no words, really, to try to express my sadness. I feel totally devastated."

She later told reporters the conference would continue out of respect for the lives lost: "Because we know that it's really what they would like us to do."

Lange had been working on HIV since the earliest years of the epidemic, participating in clinical trials and research across the world, Barre-Sinoussi said. He had dedicated his life, she said, to "the benefit of mankind."

Sharon Lewin, co-chair of the conference, called Lange a true renaissance man, who also had a keen interest in arts and literature.

"He was passionate about his job and passionate about global health and improving people's lives in low-income countries," Lewin said. "He was quite visionary actually, I think since the very early days of the epidemic and could see what the challenges were that lay ahead."

Robin Weiss, an emeritus professor at University College London, said Lange's death was comparable to that of Jonathan Mann, who led the World Health Organization's first AIDS department — and who was killed after his flight to Geneva was sabotaged 17 years ago. Weiss noted the AIDS community has grown much larger since then, lessening the impact of any one person's death in particular. CULLED