SINGAPORE, Dec 31 (Reuters) - Pakistan LNG is seeking two liquefied natural gas (LNG) cargoes for delivery in April, a tender document posted on the company website showed. The state-run procurement agency is seeking the cargoes on a delivered ex-ship (DES) basis at Port Qasim, Karachi, for delivery over April 5 to 6 and April 19 to 20, according to the document. The tender closes on Jan. 29 and remains valid until Feb. 12. (Reporting by Jessica Jaganathan; Editing by Christian Schmollinger)