Gunmen killed 22 in an attack on a mosque in Nigeria, while Muslim youth attacked churches in Dar es Salaam following reports of a Christian youth desecrating a Koran.
Shell Oil faces litigation over Nigerian oil spills in the Dutch courts, while the Obama administration is urging the US Supreme Court to dismiss a similar case.
Gunmen attacked two ships off the coast of Nigeria's oil-rich southern delta, killing two naval troops protecting the vessels and seizing four foreign workers before fleeing.
