Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Russian, Syrian Regime Forces Step Up Attacks on Rebel Stronghold Idlib Sirwan Kajjo WASHINGTON - A recent military escalation by Russian and Syrian government forces in the rebel-held northwestern Syrian province of Idlib is likely to continue in the coming weeks, experts say. On Saturday, a series of airstrikes and barrel bombings carried out by Russian fighter jets and Syrian helicopters targeted several villages in Idlib, killing at least 18 civilians and wounding dozens of others, local news sources reported. The Syrian Observatory for Human Rights, a war monitor that has researchers across the country, said all areas targeted in the recent attack were largely populated by civilians. Rami Abdulrahman, director of the Syrian Observatory, said clear skies in recent days have allowed Syrian and Russian warplanes to increase their airstrikes on the civilian population in Idlib. "It seems that improving weather conditions always bring woes for Idlib residents," he told VOA on Sunday. "Russian and Syrian regime airstrikes have increased since mid-November," Abdulrahman added. He noted that, "Saturday's massacre was the biggest attack since the recent escalation has begun."