Allegedly, on February 15, 2009, the Russian Coast Guard fired upon a Chinese merchant ship, the New Star, trying to leave a Russian port where a business dispute had been left unresolved. The merchant ship started to sink and eight crew were killed in rough waters abandoning ship, while the eight remaining crew were picked up by the Russian Coast Guard. Video available here.
Somehow, this incident escaped notice in the media accounts I've read and heard since then, despite its seeming significance. Warships don't fire on merchant ships in anger every day.
The whole deal has a Hans Solo fleeing authorities with the Millenium Falcon feel to it, complete with allegations of smuggling on the side. Legally, these kinds of issues are squarely within the world of admiralty, a legal specialty that I've dealt with only once or twice in my career (because the Colorado River is arguably one of the "navigable waters" of the United States and hence subject to admiralty law jurisdiction in connection with business taking place upon it), and then only in tort contexts.