Boston marathon bomb suspect linked to triple murder

Tamerlan Tsarnaev Credit: Johannes Hirn

Boston marathon bombing suspect Tamerlan Tsarnaev has been been linked to a triple murder in September 2011, according to US court papers.

Chechen immigrant Ibragim Todashev is said to have implicated Tsarnaev in the murder of three men found stabbed to death, in an apartment in Waltham, Massachusetts.

Todashev was shot and killed in May during a confrontation with police officials who had been interviewing him about his links to Tsarnaev.

According to Reuters, US media had previously reported that one of the victims was a close friend of Tsarnaev and authorities believe the killings were drug related.