Five men were arrested on suspicion of drug supply offences after officers carried out a string of warrants on Thursday 26 October.
Officers attended two addresses in Fochriw, one in Bargoed and one in Brynmawr to carry out searches of the properties during the operations.
Items including drugs and mobile phones were seized by officers.
A 22-year-old man from Brynmawr and two men from Fochriw, aged 21 and 27, were arrested on suspicion of being concerned in the supply of class A drugs.
Two Bargoed men, aged 19 and 25, were arrested on suspicion of being concerned in the supply of class B drugs.
All currently remain in police custody as enquiries continue.
Detective Inspector David Trew said:
“Our officers are working relentlessly to crack down on serious and organised crime, including drug supply offences.
“There is no place for illegal drugs in our communities, and these warrants demonstrate our commitment to making Gwent a hostile environment for those intent on causing misery by supplying drugs.
“Officers from our proactive, response and neighbourhood policing teams have worked together to carry out four warrants across the Caerphilly and Blaenau Gwent boroughs, arresting five men on suspicion of drug supply offences.
“Gathering information plays an integral part in informing these operations and our efforts to disrupt supply and the crimes associated to drugs.
“Your reports really do make a difference, so we’d continue to encourage those with concerns about drug offences in their area call us on 101 or 999 in an emergency.
“Alternatively, you can contact Crimestoppers anonymously on 0800 555 111.”
