Castleton Commodities terminated a charter agreement and filed a US lawsuit within the same day as part of a raging legal fight with with bulker operator Hudson Shipping Lines.

The Connecticut-headquartered commodities company says in court papers that it tore up Hudson's bareboat charter of two 61,000-dwt bulkers scheduled to be delivered soon by Japan's Shin Kurushima Toyohashi Shipbuilding.

Castleton alleges that Hudson breached the charters that would have brought it $40.1m