ABC News' Nightline contributor, photojournalist Tim Hetherington, was killed today, along with photographer Chris Hondros, in a mortar attack in the war-torn city of Misrata, Libya. According to abcnews.com, "Hetherington, one of the best known photojournalists and winner of the prestigious Dupont Award, produced powerful pieces for ABC News' 'Nightline' from the Korengal Valley, Afghanistan, and directed the documentary 'Restrepo,' which won an award at the Sundance film festival last year."

Tim was one of the bravest photographers and filmmakers I have ever met," said ABC News' James Goldston, who worked closely with Hetherington as executive producer of "Nightline."

Hetherington, 41, had been covering the ongoing conflict between rebel forces and soldiers loyal to Libyan dictator Muammar Gaddafi. His last posting on Twitter yesterday read: "@TimHetherington In besieged Libyan city of Misrata. Indiscriminate shelling by Qaddafi forces. No sign of NATO.”

"Tim was absolutely brilliant and charismatic," said Kimberly Green, President, The Green Family Foundation. "His passion for the truth took him to some of the most dangerous places in the world. And it was reporting from those places - where wars destroy humanity - that was his calling in life. Humanity, truth and justice has lost a powerful soul in Tim Hetherington."

In honor of Tim Hetherington, The Green Family Foundation will be making a donation to Reporters Without Borders. We ask that you join us.

UPDATE: From @VanityFair Correction: Tim Hetherington's death has been confirmed. Chris Hondros remains in grave condition.

UPDATE 2: Sadly, Getty photographer Chris Hondros has succumbed to his wounds in Libya.

Tim Hetherington, 'Restrepo' Director, And Chris Hondros, Photojournalist, Killed In Libya