LANGLEY, B.C. An investigation continues into what caused a massive fire at a condo development in Langley Monday. The explosive fire all but leveled the four-building pre-sale condo development that had been nearing completion. There is no indication that the fire is suspicious, but Langley Township’s deputy fire chief, Bruce Ferguson, says an in-depth investigation is underway. That investigation includes other agencies and private fire investigators. Ferguson says it appears the blaze began somewhere in the centre of the complex which was under construction. The fire forced more than 100 people living nearby from their homes, but residents in all but two units have been allowed to return.