A garda investigation has begun in Carrickmacross, Co Monaghan, after a businessman was attacked and his business premises set on fire. Joiner Thomas Marron was assaulted at his workshops at Barnadonagh at about 9.30pm on Friday. He was taken to Our Lady of Lourdes Hospital in Drogheda for treatment. Two units of Carrickmacros Fire Brigade were called to Marron's workshops at approximately 9.30pm.