When does Black Lagoon: The Second Barrage return?

Black Lagoon is a Japanese manga series written and illustrated by Rei Hiroe. It has been published in Shogakukan's seinen manga magazine Monthly Sunday Gene-X since April 2002. The series follows the Lagoon Company, a four-member team of pirate mercenaries smuggling goods in and around the seas of Southeast Asia in the early to mid 1990s. The base of operations is located in the fictional harbor city of Roanapur in east Thailand.