It has always been the contention of the "official" story that one bomb blew up the Murrah building. However,
• The following entries from the Oklahoma Highway Patrol’s radio dispatch logs:
– 10:29 a.m. "There is another bomb on the south side of the bldg. Need to get away as far as possible.... Evacuate the area of the bldg
immediately, evacuate the S. side of the bldg immediately."
– 10:33 a.m. "Adv CP [Advise Command Post] we poss [possibly] have another device." "If it is the one on the S. side we have already gb’d
[grabbed] it." "Okay." "Did you have anything further beside the one on the S. side?" "Neg [negative]."
– 10:37 a.m. "OC Fire Dept. confirms they did find a second device in the bldg." "O.K." "Cont. [contact] all troopers and have them move
all civilian personnel back 1 more block."
– 2:00 p.m. "Unable to contact ATF." "Keep tring [trying] they think they have found another device. Have one of there [sic] people contact
HQ48 on the northside of the bld."
More than one
Now, I have also seen video of news reports from Oklahoma where the reporter spoke f there being more than one bomb involved in the explosion.
However, generally the reporter only stated it once and it wasn't reported in subsequent reports, which I find odd.