Thai clashes injury toll rises to 521

BANGKOK, April 10 (Reuters) - The number of wounded from clashes between the army and red shirt protesters has risen to 521, the emergency medical centre said.

Four civilians and four soldiers were killed, deputy governor of Bangkok, Malinee Sukavrejworakit, said.

Thai troops fired rubber bullets and tear gas on Saturday at demonstrators who retaliated with petrol bombs in the biggest confrontation of month-long street protests for new elections. (Writing by Nick Macfie; Editing by Jason Szep)