KEY POINTS:
Three letters sent to Government buildings have claimed they contain the poison 1080 in the last 24 hours.
The Reserve Bank, the Ministry of Agriculture and Forestry and Parliament Buildings have been targeted.
Detective senior sergeant Paul Borrell said he believed the three letters were linked because in all three letters the sender had said the letters contained the poison used in pest control.
He said the substance is being sent to the ESR for analysis. The envelopes are also being analysed for fingerprints.
"I'm unable, for investigative reasons, to disclose any further information about the items except to say that we're determined to identify the sender," Mr Borrell said.
He said staff at each of the three agencies had done the right thing, and followed their standard operating procedures to alert police and emergency services
Yesterday an 18 story Wellington office building was evacuated. NZPA reported that MAF's mail room was on the fourth floor, where the package was sent to.
- NZ HERALD STAFF