DONETSK, Ukraine — Over the past several days shells have regularly been crashing into buildings in central Donetsk leaving gaping holes in brick facades and shattered windows. At least one person was killed in the shelling and several more have been injured.

Officially Ukrainian authorities deny shelling civilian areas, but with mounting evidence increasing doubt is being cast on those assurances. The United Nation’s nearly doubled its estimate for the number of people killed in eastern Ukraine to 2,086 as of Aug. 10 from 1,129 on July 26.