Please answer the following three questions by the following message:
PLS B ADVSD THAT BAY 24 ON DK CNTR COLLAPSED AT ABT 0230 HRS OF 1225 AT 46-
45N 179-50W DUE TO HEAVY SWELL FM P’SIDE ASTERN ROLLING 32 DEGREES
SUDDENLY. CGO WITH ITS PSN 241208, 241210, 241212 CNTRS O/B 2 SEA, CTIU8879576
N MLTU 8316457 DG CLASS 9 LEAKAGE N 15 PC LASHING BAR N 6 PC TURNBUCKLE
WERE FOUND BROKEN. DAMAGE CONTROLL IS MADE BY CREW BUT SLOWLY DUE TO
SHIPPING SEAS PLUS DARK. DETAIL REVERTING. PLS ARNG S/R WHEN 312359 LA
According to the message, how many containers were over board?