The SAR's emergency and disciplined services will stage 'large-scale' drills in response to the possibility of a bio-chemical attack - although the Secretary for Security said there was a low risk of terrorist attacks on Hong Kong. Regina Ip Lau Suk-yee said intelligence reports suggested the SAR was an unlikely target, but contingency measures to respond to bio-chemical threats were being updated in light of the anthrax attacks in the US. A spokeswoman for the Security Bureau said the details and date of the bio-terror drills were still to be decided. She said members of the public were unlikely to be involved. Addressing Legco question time yesterday, Mrs Ip said there had been 36 reports of 'suspicious bio-chemicals' since September 11. Two were hoaxes and the rest were due to 'misunderstandings'.