A Syrian fighter jet plummets through the air, tail ablaze.
Amateur video purports to show the imminent crash in Hama, Syria on Thursday.
Another clip is said to show a downed jet on the ground in Hama with some parts of it still on fire.
President Bashar al-Assad's military has used air strikes, often against urban areas, to try to keep advancing rebels at bay during the 23-month-long civil war. The rebels have limited means to fight back against jet fighters.
Reuters is unable to independently verify the content of this video obtained from a social media website.
Another unverifiable amateur video clip purports to show rebel forces in Shaddadeh, in the eastern, oil-producing province of Hasakah.
Rebels said they captured Shaddadeh after three days of battles in which, they said, 30 members of the al Qaeda-linked, anti-Assad, Nusra Front and 100 soldiers were killed.
A World Food Programme team visiting the area said 40,000 people had fled the fighting.