Swiss bank whistleblower arrested in Spain -police source

MADRID, April 4 (Reuters) - Spanish police have arrested a former employee of HSBC's Swiss private bank who was convicted in absentia of industrial espionage after leaking information on clients' tax situation, a police source said on Tuesday.

Herve Falciani, a French citizen, has said he was a whistleblower trying to help governments track down citizens who used Swiss accounts to evade tax. (Reporting by Andres Gonzalez; writing by Jesús Aguado; editing by Robin Pomeroy)