Police have arrested four people, alleged to be part of a significant drug distribution network, during early-morning raids in Newcastle and Grafton. Newcastle Knights NRL player Danny Wicks has been identified as one of those charged.

In July this year, police from the Coffs/Clarence Local Area Command formed Strike Force Welham to investigate the supply of amphetamine (Speed), cocaine and MDMA (Ecstasy) in the Clarence Valley.

Inquiries by strike force detectives led to a joint investigation with the Lake Macquarie Local Area Command.

Around 6.30am today, detectives arrested a 24-year-old man at Newcastle.

He was taken to the Belmont Police Station where he was charged with six counts of supply prohibited drugs and two counts of possess prohibited drug.

He was refused bail and ordered to appear today before the Newcastle Local Court.

Just before 7am, simultaneous search warrants were executed at a second address in Newcastle and two homes in Grafton.

A 29-year-old man from Newcastle was arrested and charged with one count of supply an indictable quantity of prohibited drug.

He was refused bail and ordered to appear today before Newcastle Local Court.

Another man, aged 22, and a woman, aged 25, were arrested at separate addresses in Grafton.

They were taken to the Grafton Police Station where they are assisting detectives with their inquiries.

Investigations are continuing.

Anyone with information about the matter is urged to contact either the Coffs/Clarence Local Area Command on (02) 6652 0299 or Crime Stoppers on 1800 333 000.