Oil prices fell on Thursday amid market skepticism about the outcome of a meeting between major producers slated for this weekend. Heavyweight suppliers, including Saudi Arabia and Russia, are gathering in Doha, Qatar on Sunday to discuss curbing their output to support prices. However, doubts are growing that even if they manage to clinch an agreement, it may not be strong enough to alleviate the continuing global glut of crude. “If there is to be a production freeze, rather than a cut, the impact on physical oil supplies will be limited,” the International Energy Agency said in its closely watched monthly market report on Thursday. Brent, the global oil benchmark, fell 1.2% to $43.64 a barrel on London’s ICE Futures exchange. On the New York Mercantile Exchange, West Texas Intermediate futures were trading down 0.9% at $41.37 a barrel.