Two men in their 20s have been arrested after a large quantity of cannabis plants were seized in Monaghan.

Gardaí from the Monaghan Drugs Unit searched two separate houses this morning and discovered an unspecified quantity of the plants.

They are believed to have an approximate street value of €300,000.

The men are being held at Monaghan Garda Station.

Meanwhile, two of the four men arrested in relation to the seizure of €1m worth of cannabis resin yesterday have appeared in court.

41-year-old James Griffin, with an address in Coolock and Joseph Douglas, 32, from Ballyjamesduff in Co Cavan, were remanded in custody to appear in Cloverhill District Court on 15 August.

The other two men remain in custody in Ballymun and Whitehall garda stations.

The seizure was made at Forestlittle Road, behind Dublin Airport, when three vehicles were stopped at 6.30am yesterday morning.

Meanwhile, two men and a woman have appeared at Carrick-on-Shannon District Court in connection with the discovery of cannabis growing factories in counties Longford and Roscommon.

47-year-old Cam Linh Louong, with an address in Drumlish, Co Longford, has been remanded in custody to appear at Tullamore District Court on 11 August.

Tim Liu, 54, of Strokestown, Co Roscommon, has been remanded in custody to appear at Harristown District Court on 15 August.

51-year-old Son Van Hoang, with an address at Castlerea in Roscommon, was charged under the Misuse of Drugs Act with cultivating cannibas plants.

Judge Conall Gibbons remanded him in custody to appear before Harristown Court in Castlerea on 15 August.