LONDON -Armenia and Azerbaijan accused each other on Thursday of moving troops close to their joint border as tensions over the future of the Nagorno-Karabakh enclave rose even as the two countries said they remained committed to a peace process. Nagorno-Karabakh, an ethnic Armenian enclave internationally recognised as part of Azerbaijan but run by ethnic Armenian authorities, is at the centre of a rancorous standoff, with Azerbaijan restricting movement along the only road to it from Armenia to thwart what it says is arms smuggling. Armenian...