Killzone: Mercenary - Lightning Strike (Demolition Contract - Petrusite Cannisters)

Note:

• The Petrusite Cannisters cannot be destroy unless you are playing the "demolition contract" or "precision contracts" on "Lightning Strike" mission
• The Petrusite Cannisters can only be destroy by D-charge.
• When playing on the "Demolition Contract" or "Precision Contracts", the Petrusite Cannisters will be shown on the radar as a "blast icon"
• The "blast icon" will not tell you what floors the Petrusite Cannisters will be on.
• Please refer to the walkthrough or the radar in the image for references for the exact locations.

The 1st  Petrusite Cannisters:

  

The 2nd  Petrusite Cannisters:

 

The 3rd  Petrusite Cannisters: