Australian police have charged four more men, including an alleged ringleader, in connection with the kidnapping and murder of a Sydney grandfather who was seized in a case of mistaken identity. The victim is understood to have been targeted as part of an extortion plot in the Blacktown area of Sydney, with the attackers apparently having intended to abduct someone else before killing him.

The new charges bring the total number of men facing court over the case, as investigators continue to piece together how the mistaken-identity kidnapping unfolded and who directed it. Full details of the charges, the alleged sequence of events and the identities of those accused, including the man described as the ringleader, have not been fully outlined in the available report.