Gwent Police have warned people not to give out personal information after a spate of suspicious phone calls in the Blackwood area.
On Monday a resident in the Oakdale area reported that she received a call at 4am yesterday morning from someone purporting to be from Welsh Water.
The caller said that the water supply at the address would be turned off between 6am and 1pm that day and asked if she would be at home during this time. When the resident said she would be, the caller apologised and hung up.