DIYARBAKIR, Turkey, April 11 (Reuters) - An explosion rocked the city of Diyarbakir in Turkey's largely Kurdish southeast on Tuesday, sending a large plume of grey smoke rising over surrounding buildings, a Reuters witness said.

Several people were wounded in the blast, security sources said. The cause of the explosion was not immediately clear.

(Writing by Nick Tattersall; Editing by Daren Butler) ((nicholas.tattersall@tr.com; Reuters Messaging: nicholas.tattersall.thomsonreuters.com@reuters.net))

Keywords: TURKEY BLAST/