The estranged wife of celebrated Ukrainian pianist Vadym Kholodenko has been charged with killing the couple's two daughters at their home in suburban Fort Worth, Texas.
Police said on Monday that Sofya Tsygankova, 31, had been charged with two counts of capital murder in the deaths of daughters, Nika, aged 5, and Michela, aged 1.
The charges could bring the death penalty in Texas.
Mr Kholodenko, 29, discovered the bodies of his children in their bedrooms early on Thursday, when he went to visit them at their mother's house.
Ms Tsygankova had suffered what appeared to be self-inflicted stab wounds in the incident, it was reported.
She was in the hospital for treatment of her injuries and will be undergoing a mental evaluation, Benbrook police Commander David Babcock said.
Mr Kholodenko said the loss of his children would be with him "forever", but he thanked supporters in Fort Worth and around the world.
The pianist, who won the gold medal in the prestigious Van Cliburn International Piano Competition in 2013, married Ms Tsygankova in 2010.
The couple filed for divorce last November, according to court records obtained by local media.