A REAR exit which could have provided an escape route for the Hongkong Bank staff was bricked in when the bank took over the housing estate premises, a Shamshuipo District Board member said. Foo Wai-lok called for a thorough inquiry into the tragedy and for the results to be made public. ''We want the Fire Services Department to state publicly whether they thought the bank's fire precautions were adequate. ''Specifically, we want the Fire Services Department to say whether there should have been a fire exit, and whether there was sufficient fire-fighting equipment in the bank,'' he said. Mr Foo said they would visit the fire and housing departments to make sure their views were known. Block One of the estate was built in 1964, and the Hongkong Bank moved in during 1965. At some point the rear exit was bricked in. Mr Foo said the Hongkong Bank had failed to protect its staff. ''They did not pay enough attention to fire prevention,'' he said. ''There was no fire exit, and there was no sprinkler system.'' Au Wing-kwai, the elder brother of Au Wai-ming - one of three patients at Kwong Wah Hospital - said: ''It is unthinkable that such a big bank as the Hongkong Bank could allow their staff in a workplace where no fire escape was available.'' He doubted whether the Fire Services Department had checked the bank. ''As a normal bank, one must have a rear door even though it may be locked. It will give another exit to escape if a fire breaks out or a grenade is thrown in,'' said Mr Au, who also works in a bank. Shamshuipo District Board elected member Yan Kai-wing said: ''This building was 30 years old, and there are lots of others around here almost the same age. ''The Housing Department should make an immediate survey of all of these to make sure there are adequate fire safety precautions.''