Both Bmobile and Amplia have issued advisories about interruptions to some of their services due to multiple fibre breaks.
The companies say the disruption is also affecting customer support channels, including the 824-TSTT Contact Centre.
Amplia customers are being asked to use the Amplia4U app for support,
Both companies have confirmed that repair teams are working to restore full service as quickly as possible.
Meanwhile, the Ministry of Transport says services at the Licensing Division are also being affected by a fibre-optic cable disruption.
The Ministry says members of the public may experience delays or difficulty accessing some Licensing Division services while repairs are carried out.
