A Syrian jet bomber crashed just after take-off from Syria's Hama airport after it encountered a technical problem, a Syrian military source said on Sunday.
The military source, quoted by Syrian state media, did not say when the crash had occurred or provide any other details.
Several Russian-manufactured warplanes have crashed since the start of the year, mostly due to technical failures which defense analysts have generally attributed to age.
A rebel source told Reuters the plane that crashed was a Russian Mig 21 fighter but this could not be independently verified.
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