SLOVYANSK, Ukraine — On an overcast day in April, staff members at the municipal museum in this eastern Ukrainian town noticed strange goings-on next door at a cultural center run by the Ukrainian arm of the Russian Orthodox Church. Groups of burly men...

A Russian TV channel accused of acting as a mouthpiece for the Kremlin is facing an investigation by Britain’s broadcasting watchdog for its coverage of the destruction of the Malaysia Airlines passenger jet. The Daily Telegraph was separately facing...