The United States on Thursday imposed a broad array of sanctions on Russia, including curbs to its sovereign debt market, to punish it for interfering in last year's US election, cyber hacking, bullying Ukraine and other alleged malign actions.

The US government blacklisted Russian companies, expelled Russian diplomats and barred US banks from buying sovereign bonds from Russia's central bank, national wealth fund and Finance Ministry. The United States warned Russia that more penalties were possible but said it did not want to escalate...