Boston bombings: Russia to help US with bomb plot probe
Russian President Vladimir Putin has offered support to American intelligence officers investigating the Boston Marathon bombings.
The main suspects Dzhokhar and Tamerlan Tsarnaev had lived in the United States for more than 10 years, but are ethnic Chechens from the troubled Caucasus region of southern Russia.
Putin's press secretary Dmitry Peskov said the Russian leader passed on his condolences to President Obama.
Mr Peskov added: "I think that contacts will be conducted between our intelligence services."