Adam reported last night on the killing of Boris Nemtsov, former deputy PM (under Yeltsin) and outspoken opponent of President Putin

An unidentified attacker in a car shot Mr Nemtsov four times in the back as he crossed a bridge in view of the Kremlin, police say, in an attack just hours after appealing for support for a march tomorrow in Moscow against the war in Ukraine

Putin has condemned the "brutal" slaying and has taken the investigation under presidential control, saying it could have been a contract killing and a "provocation" on the eve of the big opposition protest Nemtsov had been due to lead tomorrow. The Kremlin have said everything must be done to find the killers

Nemtsov had feared he would be murdered and is the most prominent opposition figure killed in Putin's 15-year-rule

US President Barack Obama condemned the "brutal murder" and called on the Russian government to conduct a "prompt, impartial and transparent investigation" while Ukrainian President Petro Poroshenko described Mr Nemtsov as a "bridge between Ukraine and Russia".

"The murderers' shot has destroyed it. I think it is not by accident,"

Markets will be keeping a close eye on developments and whilst there may not be any immediate reaction on the Asian opening this event will be adding fuel to a very delicate situation

Reuters has more here, and the BBC here