Mexico's drug cartels and gangs appear to be playing a wider role in Sunday's elections than before

Gangs and drug cartels in Mexico seem to be playing a wider role in the upcoming elections that will determine the presidency, nine governorships, and around 19,000 mayorships and other posts.

But in the runup to Sunday’s vote, gangs have increasingly taken to spraying whole campaign rallies with gunfire, burning ballots or preventing the setting up of polling stations — even putting up banners seeking to influence voters.

Security analyst David Saucedo says it's likely some drug gangs will try to force voters to cast ballots for their favored candidates.