YEREVAN/BAKU (Reuters) - Russian President Vladimir Putin said Turkey should be among countries involved in talks to end fighting in Nagorno-Karabakh, as Azerbaijan and Armenia again accused each other on Thursday of shelling civilians in and around the mountain enclave.With more peace talks scheduled for Geneva this week, the European Union said an escalation in the month-old conflict was “unacceptable” and called for a lasting settlement after the collapse of three ceasefires. The fighting has been the worst in the South Caucasus since about 30,000 people were killed in a 1991-94 war over Nagorno-Karabakh, which is internationally recognised as part of Azerbaijan but is populated and controlled by ethnic Armenians. Azeri presidential aide Hikmet Hajiyev said on Twitter that a civilian was killed when an Armenian missile hit his home in Tap, a village north of Nagorno-Karabakh. Armenia denied this.