U.S. authorities say an expert on Russian intelligence has been shot and critically wounded in front of his home in Maryland, outside Washington.
Law enforcement officials say Thursday's shooting of Paul Joyal had the appearance of a random street crime.
But they note it took place just days after Joyal accused the Russian government of being involved in last year's poisoning of former KGB agent Alexander Litvinenko in London.
In a television interview last Sunday Joyal also accused the Russian government of trying to silence its critics.
Police say 53-year-old Joyal is in stable condition.
Some information for this report was provided by AP.