<h1>Leader warns crude buy risks sanctions; envoy pushes fair trade talks; arrests after fire; former leader's arrest raises due-process concerns; nation joins conservation</h1> A U.S. political leader urged a South Asian country to address U.S. concerns about its purchase of Russian crude, signaling potential legal and sanctions compliance risks and urging bilateral consultation; an envoy from that country engaged U.S. lawmakers about fair, reciprocal trade amid tariff disputes, highlighting negotiable trade law issues. In London, two suspects were arrested on arson suspicions after a restaurant fire causing serious injuries. One country raised unresolved 1971 war-era claims and an apology with a neighboring state during a ministerial visit. Opposition parties condemned the arrest of a former president as potentially undermining due-process norms. A nation formally joined an international conservation alliance.