A man who stabbed Dublin GAA star Jonny Cooper hours after attacking a taxi driver has been jailed for five years.

Dublin Circuit Criminal Court heard that 32 year old Mark Lavelle was on crystal meth when he carried out the frenzied and unprovoked attack.

Lavelle, originally from Bollingbrook, Swinford, Co Mayo, but with an address at Basin Street, Dublin, pleaded guilty to assault causing harm to the Dublin and Na Fianna footballer at around 5am on September 20, 2014 at Dorset Street Upper in Dublin.

He also admitted to assault causing harm to Thomas Smith at Kennelsfort Road Upper in Palmerstown at around 2am on the Saturday morning and to hijacking Mr Smith's car.

Judge Martin Nolan imposed two three and a half year sentences to run consecutively and suspended the final two years on strict conditions.