LONDON (Reuters) -The potential for disruptions to Russian commodity supplies has thrown a spotlight on the metal used in the aerospace, marine and auto industries.

(Reuters) -European stocks tumbled on Tuesday, kicking off March on a dour note on weak earnings reports and jitters over the Ukraine crisis as Russia raged on with its attack after ceasefire talks between the two nations failed to reach a breakthrough.

Oil shot back above $100 a barrel and U.S. and German government debt rallied on Tuesday as massive uncertainty sparked by Russia's invasion of Ukraine unnerved investors, leading stocks in Europe and on Wall Street to slide further.

(Reuters) -The European Union is speaking to U.S. counterparts about extending a ban on Russian flights, it said on Tuesday, as it gave more details of the EU's closure of airspace to Russian aircraft imposed after Moscow's invasion of Ukraine.

The potential for disruptions to Russian commodity supplies has thrown a spotlight on the metal used in the aerospace, marine and auto industries.

LONDON (Reuters) -Asset managers including France's Amundi and BNP Paribas, Britain's HSBC and Switzerland's Pictet have frozen Russia-focused equity funds totalling over $3 billion in assets, as markets seize up following sanctions on Russia.