NAIROBI, April 4 (Reuters) - Several senior executives in Kenya's energy sector have resigned following allegations of manipulating fuel inventory data and purchasing an emergency shipment at inflated prices, President William Ruto's office said in a statement on Saturday.

The statement said Ruto accepted the resignation of Mohammed Liban, the senior secretary for petroleum affairs, while the Kenyan Pipeline Corporation confirmed that its chief executive, Joe Sang, had also resigned.

The statement also revealed the resignation of the Director General of the Energy and Petroleum Regulatory Authority, Daniel Kiptoo Bargoria.

The statement added that an official investigation has been opened into suspected irregularities in Kenya's oil supply chain.

The government said that manipulated data was used to justify the emergency importation of fuel despite existing contracts with Saudi Aramco Petroleum Products Trading in Fujairah, ADNOC Global Trading in Abu Dhabi and Emirates National Oil Company (ENOC) in Singapore, all of which are fulfilling their contractual obligations.

The investigations began amid concerns about fuel supplies related to the conflict with Iran, which has affected global energy markets.

The statement indicated that administrative measures were taken against other officials and that investigative authorities arrested a number of others without disclosing their names.