Russian-installed separatists in the Donetsk People's Republic (DPR) of eastern Ukraine will stage a referendum on joining Russia on September 23-27, the Interfax news agency reported on Tuesday citing local officials.

The separatist Luhansk People's Republic (LPR) also said on Tuesday it intends to hold a referendum on joining Russia on the same dates. (Reporting by Reuters; Editing by Jon Boyle)