Russia has long demanded his extradition to Moscow, where Berezovsky is currently being tried in absentia on charges of embezzlement. Britain has refused to comply.
Meanwhile, the Kremlin has refused to hand over Andrei Lugovoy, the chief suspect in the Litvinenko poisoning, to Britain.
In response to this refusal, Britain expelled four Russian diplomats Monday.
The Russian ambassador, Yury Viktorovich Fedotov, told the BBC that the timing of Berezovsky's revelations was "quite noteworthy," adding that this might be part of "an attempt to vindicate in the eyes of the British public the line taken by Whitehall [the British government's position]."
At his press conference, Berezosky denied any connection between his recent allegations and the ongoing clash between the British and Russian governments.
But, in an interview with ABC News, he didn't mince any words, saying that the Russian state tries "to protect not Lugovoy, but Putin himself."
"I am sure," he continued, "that Putin is in trouble, that he [is] really afraid [after] what happened. He didn't expect that polonium could be discovered."