The 1970s structure and the former BHS building could be redeveloped into a city centre hub.
Parcels and letters addressed to residents at Thistle Court in Aberdeen are being redirected after Royal Mail suspend deliveries.
Aberdeen co-leader Douglas Lumsden hit back after Nicola Sturgeon accused him of writing her 'ridiculous letters'.
Nicola Sturgeon said the 'reluctant' decision had been made as the city's outbreak is not 'completely under control'.
