COLOMBO, Jan 5 (Reuters) - A blast ripped through a bus in western Sri Lanka on Friday, the military said. "There has been an explosion, the bus is burning," Major Upali Rajapaksa, an official in the media centre for national security, told Reuters He said there was no information yet on casualties from the blast in Nittambuwa. (Reporting by Ranga Sirilal, editing by Sanjeev Miglani; Reuters Messaging:sanjeev.miglani.reuters.com@.reuters.net))
