MOUNT VERNON - Fighting fires has sparked some controversy between the Yonkers and Mount Vernon fire unions.

The Mount Vernon Fire Department called for mutual aid on Tuesday to help put out a house fire, but the head of the Yonkers fire union says it’s abusing the system.

Yonkers had to put out another fire in the Mount Vernon area on Tuesday, and the union claims that it didn't have enough manpower to fight a fire in its own city.

"We'll help them out in an extenuating circumstance, but they should not be calling for mutual aid in every fire that occurs in Mount Vernon," says Yonkers Fire Union President Barry McGoey.

The Mount Vernon Firefighters Union has been asking the city to increase its staff of 139.

News 12 has learned that there is a firefighter class to fill five of the Mount Vernon openings next month