Officials in India say a blast on a packed train that killed at least 12 people and left dozens wounded was apparently caused by a bomb.
The explosion occurred Thursday near the town of Jaunpur in Uttar Pradesh state. The train was traveling from the eastern city of Patna to New Delhi at the time of the explosion.
Local news media reported Friday that bomb experts found traces of the explosive substance RDX (also known as Hexogen) in the train. A local official told the French News Agency the blast came from an unclaimed suitcase near a toilet.
RDX, which forms the base of a number of common military explosives, has been used by Islamic militants fighting Indian rule in Kashmir, as well as by separatist rebels in the troubled northeast region, who frequently target trains.
Some information for this report provided by AFP and Reuters.