Russia detains three more people over concert shooting

Russia has detained three more people suspected of involvement in last month's mass shooting at a concert hall near Moscow, the FSB security service was quoted as saying on Thursday.

A Russian citizen and two foreign citizens, all originally from Central Asia, were detained in Moscow, Yekaterinburg and Omsk, Interfax quoted an FSB statement as saying.

At least 144 people were killed in the March 22 attack on the Crocus City Hall, the deadliest in Russia for 20 years.

Militant group Islamic State claimed responsibility but Russia has said, without providing evidence, that it believes Ukraine was behind the massacre.