State-run Petroperu has launched a tender to buy a 360,000 barrel cargo of a Latin American or West African crude to be received at Conchan and Talara ports on September 26-30, according to a document seen by Reuters on Tuesday. The Peruvian company has been buying 1-2 monthly cargoes of crude on the open market so far this year and it has also recently tendered to purchase fuel oil, naphtha, ultra low-sulfur diesel (ULSD) and biodiesel. For this tender, the company will accept offers of Ecuadorian Napo or Oriente crudes; Colombian Vasconia, Castilla, South Blend or Cano Limon; Venezuelan Lagotreco, Mesa 30, Santa Barbara or Leona 24; Argentine Escalante, Canadon Seco or Roncador 28; and Brazilian Bijupira or Marlim. It will also accept offers of any West African crude.