Chief medical officer Dr Tony Holohan and his deputy Dr Ronan Glynn were reportedly targeted on Friday night.
The pair are among the most prominent public figures in Ireland’s response to the coronavirus pandemic.
Separately, a health journalist released a recording of a strange call he got in the early hours of Saturday.
Fergal Bowers, a correspondent for Irish national broadcaster RTÉ, said he received the anonymous call just after 03:30 local time and would be “alerting the relevant authorities”.
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