Some residents have returned to the Sydney Olympic Park high rise that authorities feared was at risk of collapse but it will be a grim Christmas for other residents after 51 units were deemed unsafe.
Engineers and the building's managers remained at the 38-level building overnight but emergency services have since left after declaring there are no longer concerns of the tower collapsing.
Emergency services were called to the site on Monday afternoon following reports residents had heard and seen cracking in a wall throughout the morning.
About 300 people from more than 150 units in the 392-apartment Opal Tower and neighbouring buildings were evacuated amidst fears the brand-new high rise could collapse.
