Not content with the four new boats they captured (Berman Post: Somali Pirates on a Hijacking Spree), the pirates tried to take an American cargo ship. While automatic weapons fire and RPGs were fired at the ship, non of the crew were injured or killed. After radioing for help, the crew barricaded themselves in the engine room. The Navy responded and is now escorting the ship. There is some damage to the ship, but ultimately the pirates were not able to get on board.
More at http://www.nbcnewyork.com/news/us_world/NATLUS-Cargo-Ship-Hijacked-Near-Somalia-Coast-Officials.html?.