Tanzanian PM to resign over graft

Tanzania's prime minister has tendered his resignation after being implicated in an energy deal corruption scandal.

"Because I have been linked to this scandal, I have decided to write to the president asking to be relieved of my duties," Edward Lowassa told MPs.

He has denied that his office was involved in improperly awarding a contract to US-based electricity company Richmond Development in 2006.

The firm failed to provide emergency power during a power crisis in 2006.