Islamic State says it kidnapped six aid workers in northeast Nigeria

ABUJA (Reuters) - Islamic State's West Africa branch said on Thursday it was responsible for the kidnapping of six aid workers in northeast Nigeria, according to a tweet published by the SITE monitoring group.

Separately, the Nigerian presidency said the government was negotiating for the release of the kidnapped aid workers.

(Reporting by Paul Carsten and Felix Onuah; Writing by Chijioke Ohuocha)