Government psychologists are to hold a 'sharing session' tonight with MTR passengers traumatised by the subway arson attack on Monday to help them manage stress arising from the incident. The Social Welfare Department's chief clinical psychologist, Helios Lau Kar-cho, said the sharing session would allow the passengers to talk about their experiences and feelings. The psychologists would explain to the victims the reactions they should expect to experience in the aftermath of the incident. The reactions are likely to included insomnia, nightmares or repeated flashbacks of the incident and would normally last for about two weeks. 'Some men may not accept the fact that they felt frightened, while others may blame themselves for knocking down people as they escaped,' Mr Lau said. Failure to accept these kinds of reactions could make recovery difficult. 'The sharing session will allow them to identify which symptoms are okay and which aren't,' he said. The passenger hero, an assistant secretary for Economic Development and Labour, Gavin Kwai Sze-kit, who shouted at the arsonist to stop, said he did not take the MTR the day after the incident. Mr Lau said that was a normal reaction. But Mr Lau said if such feelings persisted for more than two weeks or the victims' daily life was still affected, follow-up treatment would be needed. Mr Lau said follow-up treatment would also be needed if passengers were suffering from intense symptoms such as dizziness and breathing difficulties. Minor symptoms could deteriorate into a post-traumatic stress disorder and other problems such as depression if they were not handled properly. The sharing session has been organised by the department's debriefing core group. It was set up in 2000 when the government saw the need to provide more systematic help to victims of major crises such as the arson attack at Immigration Tower in 2000. Tonight's session is scheduled for 6pm at Lady Trench Training Centre at Oi Kwan Road, Wan Chai. People interested in joining can call 2852 3137 during office hours to register with the Social Welfare Department.