STAFF at the Landmark yesterday called for increased security to protect them from robbers attracted by the expensive goods in the Central shopping mall. Shop assistants working in the busy upmarket shopping centre said on average only two security guards could be seen on duty and believed yesterday's $4 million jewellery shop robbery would prompt an increase in security. An employee of Lanvin, next to the escalator the robbers used, said: ''We didn't see any security until after the incident. We don't recall seeing any on duty earlier today. We have always worried about a robbery and whether or not the security here could prevent it. I guess not.'' The shop assistant, who asked not to be named, said she and her colleagues became frightened when they heard shouting and saw shoppers diving for cover. She said police were screaming out to shoppers to get down as they ran to the escalators in front of their shop and drew their guns. ''I was horrified,'' she said with her hands still shaking. ''We didn't know what was going on until we saw police shouting outside our doors pointing their guns downstairs. We just locked the door and ducked down behind the counter.'' A shop assistant in nearby Paloma Picasso handbag shop, Lynette Chu Lin-yuet, said she did see security staff on duty at the time but felt present security could not deter a similar holdup happening again. ''There are a lot of exits and big open spaces for thieves to easily escape through,'' she said. Yvonne Tam Sau-chuk who works directly opposite the jewellery shop, in Loewe, said she hoped yesterday's incident would give rise to a security revamp. ''I'm not really certain if the security we currently have in the Landmark is enough. But I would feel a lot safer if it was increased,'' she said. But not all workers in the centre felt security was insufficient. A staff member of Edinburgh Tower management said he had faith in the job being done by security staff and police. ''I feel with the security officers we have, plus patrolling police, the Landmark is a safe place,'' he said. A shop assistant from the Davidoff tobacco shop agreed, saying ''the centre's record is good as we barely get an average of one robbery a year''.