MADRID (REUTERS) - Former JPMorgan employee Javier Martin-Artajo, who is wanted by the United States on fraud and tax crime charges, was arrested in Madrid on Tuesday morning, Spanish police said in a statement.

Martin-Artajo handed himself in to police after they found him and got in touch with him, the authorities said.

Earlier this month, US prosecutors brought criminal charges against Spaniard Martin-Artajo and his former colleague Julien Grout, who each worked for JPMorgan's chief investment office in London, in connection to the "London Whale" trading scandal that cost the bank US$6.2 billion (S$7.9 billion) last year.