Jerusalem rocked by bomb explosion on bus

Investigation under way after blast in south-west of city leaves at least 21 people injured, two of them seriouslyA bomb explosion on a Jerusalem bus has injured 21 people, two of them seriously, according to Israeli security sources.The explosion, the first in Jerusalem since the end of the second intifada a decade ago, gutted the number 12 Egged bus and set fire to a second passing bus, as well as a car. Most of the injuries occurred when the second bus was caught in the blast from the first.