This story is free to read.

The Latest: 22 lbs of explosives used in Tunisian bus attack

A man walks past the bus that exploded Tuesday in Tunis, Wednesday Nov.25, 2015. Tunisia's president declared a 30-day state of emergency across the country and imposed an overnight curfew for the capital Tuesday after an explosion struck a bus carrying members of the presidential guard, killing at least 12 people and wounding 20 others. (AP Photo) A man walks past the bus that exploded Tuesday in Tunis, Wednesday Nov.25, 2015. Tunisia's president declared a 30-day state of emergency across the country and imposed an overnight curfew for the capital Tuesday after an explosion struck a bus carrying members of the presidential guard, killing at least 12 people and wounding 20 others. (AP Photo)

By Associated Press November 25, 2015 1 min read

TUNIS, Tunisia (AP) – Tunisia’s Interior Ministry say 10 kilograms (22 pounds) of military explosives were used in an attack on a bus carrying presidential guards that left 13 people dead.

It said in a statement Wednesday that either a backpack or an explosive belt containing the explosives was used.

It says the 13th body is believed to be the “terrorist who caused the explosion,” but says the body can’t be identified by fingerprints because no fingers were found. It said a DNA analysis of the body is underway.

No one has claimed responsibility for Tuesday’s attack in central Tunis.