London ? Two prominent Britons received packages believed similar to parcels containing dangerous chemicals disguised as aromatherapy samples that were mailed to Prime Minister Tony Blair’s home and a Scottish lawmaker’s assistant, police said Saturday.

But the packages were thrown out unopened when the recipients became suspicious, and police may never know what was inside, a Scotland Yard official said. He refused to identify the recipients.

On Friday night, Scotland Yard announced that two packages  one received in the mail at Blair’s 10 Downing Street residence and the other by a female assistant of Scottish legislator Mike Rumble  contained sodium hydroxide, also known as caustic soda.

The extremely corrosive substance, which can cause blindness or scarring, was disguised as eucalyptus oil and came with directions for its use and a leaflet calling it a complimentary sample.

Anti-terrorist officers said they continued to focus their investigation Saturday on a claim of responsibility by a man who said he had mailed 16 such packages in Britain as part of a campaign by the Scottish National Liberation Army, an extremist Scottish nationalist group formed in 1980.

Press Assn., Britain’s national news agency, quoted an unidentified sources as saying the parcel received at 10 Downing Street was addressed to Blair’s wife, Cherie. The Blairs are in Australia.

Scotland Yard and Blair’s office refused to comment on the report but confirmed that no one was injured by the parcels.

Scotland Yard warned the public not to open suspicious mail.