A police officer was killed and eleven other people were injured in a grenade attack on a church in a police compound in Kenya. As the BBC reports, most of those injured were police officers.The attack is the latest in a series that has been blamed on the Somalian militant group al-Shabab. The strikes are believed to be a retaliation for Kenya’s involvement in Somalia, where Kenyan troops have participated in a UN-backed intervention. In July, more than 15 people were killed in a similar grenade attack at two churches.We’ve noted before that religious violence, particularly between Muslims and Christians, has been spreading across Africa at an alarming rate. In the past month alone, we’ve seen the rise of grassroots Islamic justice in Egypt, rocket attacks in Nigeria, and now grenade attacks in Kenya.Africa already has more than its share of problems, but how struggling African governments handle this issue will be one of their most important tests. At the moment, the outlook isn’t too good.