The order comes after election officials received letters demanding they set aside the ballots of possible non-citizen voters.
Many Ukrainians, who have faced years of Russian attacks, did not take the messages seriously and doubted their veracity.
Local officials say 27 people are missing after at least nine 3,000kg aerial bombs hit a village in southern Ukraine.
Though unprecedented, the six-day truce has done little to alter the wider trajectory of a war that continues to grinds on.
Jos Leijdekkers has been found guilty in absentia of cocaine smuggling and is believed to be in Sierra Leone.
A Hungarian fighter jet escorted the aircraft to Budapest after the threat was received mid-air.
One store in Sweden says temperatures for its freezers were set to 50 C (122F).
The attack on Donovan Marx, 50, comes as right-wing groups say there is a genocide of white people - a claim widely discredited.
The country was the first to contribute troops to the AU mission established to stabilise Somalia in 2007.