The Ukrainian arms company Ukroboronprom has promised significant cash rewards to anyone who manages to capture or hijack a Russian fighter jet or helicopter.
The company offered $1 million for a functioning jet, on the Telegram messaging app. It offered half that sum for a helicopter.
The company also issued an appeal to Russian pilots: "For pilots of the Russian Federation who are willing to participate in this programme, we guarantee you will be granted citizenship in a free country!"