Hundreds of Boston Logan Airport workers, including cabin cleaners, baggage handlers, skycaps and wheelchair attendants, are starting a strike at 4:30 p.m. with no end date.

The workers are striking over low wages and allegations that they've been targeted and threatened for union organizing, according to the union seeking to support them, SEIU 32BJ.

The workers are employees of JetBlue subcontractors FFS and ReadyJet.

The strike will start at the Airport station on the MBTA's Blue Line in East Boston, not far from Logan Airport.

The picket lines will continue from 9 p.m. to 11 p.m. at Terminal A.

A majority of the workers voted to strike last week, but had not announced a date. Boston Mayor Marty Walsh and local elected officials said they backed the strike vote and appeared with airport workers at SEIU offices in downtown Boston.

"Illegal intimidation and threats won't stop us from organizing to make airport jobs better," Dayail Gethers, a wheelchair attendant for FSS, said in a statement. "I'm ready to go on strike and I know hundreds of my coworkers stand with me."

According to the union, the FAA requires airlines to provide accessibility services for people with disabilities. Required security searches of planes are often carried out by subcontracted cleaners.