TANZANIA disbanded a parliamentary committee on Saturday after some of its members were accused of corruption and potential conflict of interest over their involvement in deals with the state-run power utility.

National Assembly speaker Anne Makinda disbanded the energy and minerals committee, charged with overseeing the mining, oil and gas sectors.

"I am disbanding this committee and have instructed the parliamentary ethics and privileges committee to draft a strict code of ethics for members of parliament," she said.

Tanzania is Africa's fourth-largest gold producer and is fast becoming an energy hub in East Africa after recent natural gas discoveries offshore.

Investors have long complained of graft as one of the main reasons for the high cost of doing business in Tanzania, while the public is losing patience with the government over the slow pace of fighting the problem.

MPs have accused some of their colleagues in the 28-member energy and minerals committee of bribery and conducting private business deals with the state-run Tanzania Electric Supply Company (Tanesco), whose MD was suspended two weeks ago on allegations of embezzlement and abuse of office.

Among accusations raised in parliament against some members of the committee was a claim that they received bribes to try to defend the suspended management of Tanesco.

The speaker said she had ordered an internal investigation into allegations that some members of parliament on the energy and minerals committee had received or had solicited bribes.

She said she would disband other parliamentary committees facing similar graft allegations and reconstitute them in an attempt to restore public confidence in the national assembly.

Energy and Minerals Minister Sospeter Muhongo told parliament on Saturday Tanesco MD William Mhando had been suspended pending an investigation into claims he had awarded a contract worth more than 880-million Tanzanian shillings ($557700) to a company that he jointly owned with his wife and children.

Mr Muhongo said the Tanesco chief, his deputy and two other senior officers were suspended over these allegations of graft in a contract involving the procurement of oil for a 100MW thermal power plant. Mr Mhando, who has denied the allegations, was being investigated by the government's chief auditor, said the minister.

Tanzania's energy sector has over the past five years been hit by widespread graft allegations amid a chronic energy shortage.

In 2008, the country's former prime minister, Edward Lowassa, and two other ministers were forced to resign after a parliamentary probe linked them to a scandal over another power generation contract.