Kent police is investigating the possibility that three letters sent to mosques on 2 May 2018 are linked.
At 12.23pm officers received a report that a suspicious letter containing white powder had been sent to a mosque in Giles Lane, Canterbury. The area was cordoned off and no injuries were reported. The powder was tested and it transpired to be a harmless substance.
A similar report was received at 3.10pm at a mosque in Mote Road, Maidstone and that too has been found to contain a harmless substance.
Officers are also investigating the delivery of an offensive letter to a mosque in Gravesend. No white powder was contained in the letter.
Enquiries are on-going.