Fighting between rival groups in Sudan’s Darfur killed at least 168 people on Sunday, an aid group said, in the latest bout of deadly violence to hit the restive region. Darfur, which was ravaged by civil war that erupted in 2003, has seen a spike in deadly conflict since October last year triggered by disputes mainly over land, livestock and access to water and grazing. The latest fighting erupted on Friday in the Krink region of West Darfur, said Adam Regal, spokesman for the General Coordination for Refugees and Displaced in Darfur, an independent aid group. “At least 168 people were killed…