Police in Glasgow are investigating suspected voter fraud.
Glasgow City Council reported three cases of alleged "personation" following Thursday's poll.
The offence occurs when a person votes as someone else.
It is understood one instance is being investigated in each of the Glasgow North, Central and South seats.
A Glasgow City Council spokesman said the authority is "co-operating with the police" on the matter.
BBC Scotland reported further possible cases of voter fraud in the Stirling and Paisley and Renfrewshire North constituencies.
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