Hong Kong International School has tightened its security as world tensions grow over the threatened United States-led war against Iraq. Parents have this week been advised of procedures the American school could take in event of mounting hostilities, which include it having to close. 'In light of growing concerns in the world about the outbreak of hostilities, we would like to remind our community of our procedures,' the school wrote to parents. 'Just as in the case of heavy rain warnings, poor road conditions, and the like, it is our local situation that would be the basis for decisions to close school. In other words, it is the security situation in Hong Kong that is the primary basis for our security decisions,' the notice said. 'We review our security measures on an ongoing basis for both our facilities and our programmes off-campus. We also keep in close contact with the US consulate and local law enforcement agencies, both on a regular basis and more recently after the change in the threat levels,' it said. Diana Van-Fleet, HKIS's communications manager, said: 'We are trying to be proactive, letting parents know what we would do if we have to close the school. If anything were to happen, which we are not anticipating, we should have something in place. We will continue with business as usual unless we are told there is a threat to our school and students.' English Schools Foundation schools increased their security after the Bali bombing in October. John Bohan, acting chief executive, said arrangements could be reviewed in the event of war. 'But if we make the security much tighter it would make our schools very unwelcoming,' he said.