By James Pearson and Raphael Satter LONDON (Reuters) -Internet connectivity in Ukraine has been affected by the Russian invasion, particularly in the southern and eastern parts of the country where fighting has been heaviest, internet monitors said on Saturday. Russian forces captured the southeastern Ukrainian city of Melitopol on Saturday, Russia’s Interfax news agency reported, as Moscow launched coordinated cruise missile and artillery strikes on several cities, including the capital Kyiv. Connectivity to GigaTrans, Ukraine’s main internet provider, dropped to below 20% of normal levels be…