Ukraine investigates mid-air crash that killed three pilots

On Sunday, Ukraine’s Vasilkiv tactical aviation brigade identified the other two pilots killed in the collision as Viacheslav Minka and Serhiy Prokazin

(Bram Janssen/AP)

Ukrainian authorities have launched an investigation after a mid-air collision between two warplanes in the west of the country killed three pilots.

Air force spokesman Yuri Ihnat told Ukrainian television on Sunday it was not immediately clear how long the inquiry would take.