Nine crash victims called a government hotline to seek counselling, while others were treated by psychologists and social workers.
No figures were available but the Social Welfare Department said it had sent 'a significant number' of clinical psychologists and social workers to treat victims.
Hospital Authority psychologists also provided support for the injured and their families.
The action was necessary as some victims could develop post-traumatic stress disorder, Deputy Director of Social Welfare, Patricia Chu Yeung Pak-yu, said.
'I have visited more than 20 victims. They appear calm for now but we opened our counselling service for major tragedies like the Garley Building fire and the Pat Sin Leng fire.' Symptoms of post-traumatic stress disorder include sleeplessness, nightmares and vivid re-call of the incident, she said.
Victims or their families and friends can telephone 9387 2006 for assistance.