The body of Daniel Mbolu Musyoka was found near Mt Kilimanjaro along Kenya’s southern border, some 200 km (124 miles) from his base in Nairobi.

This has been one of the most peaceful election periods in Kenya’s history, but the disappearance of Musyoka last Wednesday raised concerns about the safety of election officials.

He stepped out of a vote-counting centre in the east of Nairobi to answer a call and was never to be seen alive again. Police are investigating the circumstances surrounding his disappearance and death.

The electoral commission’s chairman, Wafula Chebukati, said other staff members have been profiled, arbitrarily arrested and he had faced intimidation and harassment.

He declared William Ruto winner of the presidential election on Monday amid scuffles in the national tallying centre.

"Two commissioners and the chief executive were injured in the chaos,” said Mr Chebukati.

Four other commissioners disowned the results claiming the process was "opaque", and the Azimio La Umoja coalition led by former Prime Minister Raila Odinga has disputed the outcome.