31.  The second bus caught fire from the blast, and passengers on both buses were wounded.

32.  The second bus followed.

33.  The traveling group included a second bus, plus teachers and parents in four or five cars, Byerly said.

34.  There were conflicting reports about whether a second bus was also involved.

35.  They also released women and elderly people from the second bus, according to officials speaking to the Interfax news agency.

36.  They let one bus go and released women and elderly people from the second bus.

37.  Witnesses said a second bus was damaged by the blast in the first bus.

38.  Witnesses said a second bus was damaged in the blast..

39.  Witnesses said bus that exploded was apparently passing the second bus when the blast occurred.

40.  Witnesses said a second bus was damaged by the bomb on the first one.