Update 1-esmark says arcelormittal suit "frivolous"

NEW YORK, May 9 (Reuters) - Steel producer and distributor Esmark Inc (ESMK.O: Quote, Profile, Research) branded as "frivolous" on Friday a breach of contract lawsuit brought by ArcelorMittal (ISPA.Esmark says ArcelorMittal suit "frivolous" ForbesArcelorMittal sues Esmark over aborted steel mill sale Chicago TribuneMetals News & Prices - WTRF - EasyBourse.com - Economic Times