LONDON — British police sent the results of a two-month inquiry into the death of former Russian security agent Alexander Litvinenko to prosecutors yesterday, raising the possibility a suspect could be charged with his murder.Prosecutors will use the file — which contains details of investigations by London police in Britain, the United States and Russia — to decide whether any individual will face criminal charges, police said.

Police declined to comment on whether the file named suspects or recommended that charges be filed. Such files typically are handed to prosecutors when officers believe they have built a conclusive case, a prosecutions spokeswoman said.

“We are not prepared to discuss the contents of the file,” police said in a statement.

Prosecutors must decide if the evidence gathered by police is sufficient to secure a conviction, the prosecutions spokeswoman said, speaking on condition of anonymity in keeping with its regulations.

Detectives have not closed the case, a police spokeswoman said, and would continue to hunt for evidence.

Litvinenko, a critic of the Russian leadership who lived in exile in London, died November 23 from a lethal dose of the radioactive element polonium-210.

In a deathbed statement, he accused Russia’s President Vladimir Putin of ordering his murder, an allegation the Kremlin has denied.

A Russian businessman named by British media as a key suspect in the case told The Associated Press on Saturday that he had no role in the killing.

Andrei Lugovoi, who was interviewed in Moscow by Russia officials on behalf of London police, said yesterday he would meet again with British investigators.

“I hope for lack of bias from the British prosecutor’s office and hope for some definition in this case,” Lugovoi said, according to the Russian news agency Interfax.

“If the British prosecutors have new questions, I am ready to meet with them again,” he was quoted as saying.

Russia’s Prosecutor General’s office has said Russia would not extradite Lugovoi to Britain if he is charged in the British inquiry.

“Now that the file has been sent to the prosecutors, I certainly hope they will bring charges regardless of the prospect of extradition. These people should be brought to justice,” said Alex Goldfarb, Litvinenko’s friend.

“The British police have been wonderful. So far everything has gone by the book despite the Russian government doing everything to prevent them doing their work.”

British detectives who travelled to Moscow in December were not allowed to interview Lugovoi and a second man, Dmitry Kovtun. Instead they were only able to sit in on questioning of the two Moscow-based businessmen by Russian prosecutors.

Lugovoi and Kovtun met with Litvinenko at London’s Millennium Hotel on November 1, hours before he said he felt ill.

Police focused on the hotel as the likely place where Litvinenko was contaminated with polonoium-210.

Health officials said it was probably concealed in food or a drink and detectives ran extensive tests on a tea cup, tea pot and a dishwasher at the hotel.

Of the 13 people who tested positive for contamination with polonium-210 since Litvinenko was poisoned, eight worked at the hotel. The area has remained off limits to the public since being closed December 8.