Kenyan police have arrested one person suspected of being behind the killing of an Irish priest who had been a missionary in the country for more than four decades.

Jeremiah Roche, a 68-year-old from west Limerick, was stabbed to death a week ago at his home on the outskirts of Kericho town, about 200km west of Nairobi.

The burglars stole a laptop, his mobile phone and an unknown amount of money.

Fr Roche had worked in Kenya since 1968.

His body was found by parishioners after he failed to appear for a 6am Mass.