JUBA, April 26 (Reuters) - South Sudanese rebel leader Riek Machar arrived in Juba on Tuesday, a Reuters witness said, returning to the capital for the first time since a conflict erupted more than two years ago and after a row last week over the weapons he could bring.

(Reporting by Denis Dumo; Writing by George Obulutsa) ((george.obulutsa@thomsonreuters.com; Tel: +254 20 499 1232; Reuters Messaging: george.obulutsa.thomsonreuters.com@reuters.net))