Troppau, Austrian Silesia, May 10.- Many thousauds of miners are on strike in the mining districts in Silesia. A body of miners marched upon the colliery in Polish Ostrau carrying weapons of various descriptions. The buildings and pit entrances were guarded by gendarmes. The rioters began pelting the pólice offioers with stones, wounding a number. Finally the inob made a rush upon the pólice. The gendarmes, after a last warning, opened fire, killing nine rioters and wounding 20 others. The inob fled in all direetions.