MEXICO CITY (AP) — A coalition of non-governmental groups monitoring Mexico's election campaigns say vote-buying schemes and threats of cutting off social programs for those who vote wrong have targeted entire communities.

The United Nations-sponsored Citizen Electoral Observation Network said Tuesday it has identified widespread schemes in the run-up to Sunday's elections.

Civic Alliance, one of 28 participating organizations, says it has received 350 reports from 30 states with violations, such as giving voters cash or cards that will work for purchases after the election.

Beatriz Camacho of Civic Alliance Nuevo Leon says complaints have been made against all the parties, but most have been directed at the ruling Institutional Revolutionary Party.

The coalition documented 6,434 active government social programs in Mexico, creating opportunities of the ruling party in each jurisdiction to pressure voters.