As Kenyan elections draw closer, the country's head of the election commission has been shot dead.
This is after he posted a photo of himself beside the vehicle of the late Chris Msando, the acting ICT Director at the Independent Electoral and Boundaries Commission.
Electoral commission chairman Wafula Chebukati met with protesters and said the commission is determined to do its job.
Tensions have risen in Kenya ahead of the presidential election, a bad-tempered and tight race between President Uhuru Kenyatta and longtime opposition leader Raila Odinga.
No one has found the motive or the criminals behind Mr. Msando's death, Mr. Campbell said, and both NASA and the current government are capable of tampering with the election.
Details of the murder were still coming through as the country went into High Alert mode.
Kenyatta has repeatedly denied accusations leveled by the opposition that he wants to use force to rig the elections.
The brutal murder of a key election monitoring official barely a week before Kenyans vote for a president has heightened doubts of the east African nation's ability to hold a peaceful and credible election.
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Several dozen protesters marched to the electoral commission offices Tuesday in central Nairobi, demanding justice for election official Chris Msando.
Anti-corruption campaigner John Githongo says Msando's killing was meant to derail the electoral process.
Msando had reported to police in December that he had received threatening messages and phone calls in October, the statement said, but he had not followed up his initial complaint.
Rashid Abdi, regional analyst at global crisis group, also expressed fear that public confidence in the vote could be affected. "This is someone who was involved in a critical component of the elections - the electronic infrastructure".
Kenyatta, who leads the Jubilee Alliance, is seeking a second and final five-year term.
Odinga said fraud robbed him of victory in the past two elections.
In 2013, electronic voting machines suffered widespread malfunctions, and Odinga took his complaints to court, only to have them dismissed.
And analysts are warning more violence could be coming, reports AP.