PHOENIX (AP) — Political leaders in Arizona have asked authorities to investigate an office building being used to temporarily hold immigrant children and families while they are being transported.

Democratic office holders and candidates held a news conference Monday to denounce the use of the building for immigrant children.

MVM, the government contractor leasing the space, says the kids and parents are only there while they wait for airplanes and buses and don't spend the night at the facility.

Kate Gallego, a city councilwoman who is running for mayor, said she asked the city to conduct a fire code inspection, which was scheduled for Monday.

Gallego said it's not safe to have kids in a facility that's not licensed for child care. MVM says it isn't one.

Over 2,000 kids have been separated from their parents at the U.S.-Mexico border.