(KCEN) -- Election officials in Colorado are on high alert today after allegations that two voting machines malfunctioned during early voting.
One of the machines was in Adams County, the other was in the city of Pueblo.
In both cases, voters say electronic voting machines had changed their presidential vote.
Under close watch of both Republican and Democratic party officials, state election officials tried to reproduce the problem but weren't able.
Both machines in question will not be used during today's voting.
Colorado will be under scrutiny, as the results could shape the outcome of a close presidential race.