Russian investigators say they have exhumed the remains of Czar Nicholas II and his wife, Alexandra, in a bid to identify bone fragments that may belong to two of their children.

Seven members of the Romanov family were killed by Bolshevik revolutionaries in 1918 in the Russian city of Yekaterinburg, a year after they were ousted from power during the Russian Revolution.

The remains of the royal couple, along with three of their five children, were found in 1991 in a mass grave. After being identified with DNA analysis, they were reburied in St. Petersburg on July 17, 1998, the 80th anniversary of their deaths.

The Russian Orthodox Church made them saints in 2000.

http://edition.cnn.com/2015/09/24/europe/russia-czar-nicholas-ii-exhumed/index.html