CLEAN : US ambassador in stable condition after attack: official

The transcript discusses an incident involving an ambassador who sustained non-life-threatening injuries and is in stable condition. The US government condemns the act of violence, and the assailant has been arrested. The US appreciates the Korean National Police's efforts and refers investigation questions to them.

What was the condition of the ambassador mentioned in the text?

What was the nature of the injuries sustained by the ambassador?

What action did the US government take regarding the act of violence?

Who has been arrested according to the text?

What should be referred to the Korean National Police?