BUZZ-European telcos hit a bump as TeliaSonera and Telenor call off Danish merger

** TDC falls 5.9 pct to lows not seen sinceNovember 2012 after TeliaSonera and Telenor call off plans to merge their Danish unit

** Merger blocked by the European Commision

** TDC has struggled with increased competition in theDanish market compared with other European countries

** Suggestion from some analysts co will struggle tomaintain its dividend

** Top faller on Stoxx 600 and among most traded byaverage 30-day volumes

** Trader says telco sector being sold on increaseduncertainty surrounding European Commission's position on othermergers. Sector index off 1.9 pct

** Telecom Italia, Telefonica, Cable &Wireless, Vodafone, BT and Bouygues all in top 20 fallers on Stoxx, down 1.2-3 pct

** In Hong Kong, CK Hutchison Holdings off 2.5pct into the close as regulator uncertainty rises. Co has saidit expects to receive approval for its mergers in UK and Italynext year (RM: alasdair.pal.thomsonreuters.com@reuters.net)