BENBROOK, Texas (AP) — Police say the two daughters of an award-winning concert pianist have been found slain in their Texas home and the musician's estranged wife is being treated for stab wounds.

Benbrook police Cmdr. David Babcock said Friday that Vadym Kholodenko (vuh-DEEM' koh-loh-DEN'-koh) is cooperating with investigators and that no one has been arrested in the deaths of 5-year-old Nika and 1-year-old Michela.

Babcock says the wife, Sofya Tsygankova, is being treated for non-life-threatening injuries. He provided no information on how the children died.

Babcock declined to say who called 911 Thursday to summon officers to the Fort Worth-area home where Tsygankova lived with the two girls. There were no signs of forced entry.

The Ukranian-born Kholodenko won the 2013 Van Cliburn International Piano Competition in Fort Worth.