By Trend A Sukhoi Su-25 warplane has crashed in Russia’s southern Rostovregion, an emergency source told TASS on Tuesday, Trend reports. “The plane crashed in the Chertkovsky district. According topreliminary reports, the pilot was killed in the crash,” he said,adding that the aircraft had caught fire upon impact. “A technical failure is believed to have caused the crash,” thesource noted. There were no casualties or damage on the ground. — Follow us on Twitter @AzerNewsAz