Strike Force Chowan - which was setup last year after a series of armed hold-ups - moved in on a home in Narrabri on Thursday morning.

Police raided the Blanche Peadon Drive home after a tip-off in connection to robberies at the Oxley Vale Superette and the Shell truck stop in Narrabri in September, last year.

"Police have received further information in relation to the armed robberies, and as a result of that, officers executed a search warrant on Thursday," Oxley Detective Acting Inspector Jason Darcy told the Leader.

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"Police seized a small quantity of cannabis, and clothing items of interest to the investigation which we believe are connected to the investigation into those armed robberies."

A Tamworth woman has been charged with concealing a serious indictable offence, and is accused of concealing information connected to the robberies. She will front a hearing later this year.

"Further information has come to light, and that is in addition to a woman being charged with concealing," Detective Darcy said.

"Now, the information gathered in this search warrant is another piece of the puzzle and has put police another step closer to putting the offender before the court."

Strike Force Chowan was setup by Oxley detectives to investigate the armed hold-up of the Oxley Vale Superette on Manilla Road on September 29, last year; as well as the armed robbery of the Shell truck stop in Narrabri on September 26.

In both hold-ups, the staff were threatened by offenders wielding knives.

Late last year, Oxley police said a mystery caller to Crime Stoppers held critical information in the case and made a public appeal for the caller to make contact again.