LOS ANGELES/NEW YORK (Reuters) - Ten women who work at McDonald’s restaurants in Detroit, Chicago, Los Angeles and six other cities have filed sexual harassment complaints in the past few days with the federal government against the company and its franchisees, which they said ignored or retaliated against them for such complaints.

The logo of a McDonald's Corp restaurant is seen in Los Angeles, California, U.S. October 24, 2017. REUTERS/Lucy Nicholson

The complaints, filed with the U.S. Equal Employment Opportunity Commission (EEOC), are the latest effort by the union-backed Fight for $15 to have McDonald’s designated a “joint employer” of workers at McDonald’s franchises and thereby liable when its franchisees violate labor laws.

The claimants, including a 15-year-old from St. Louis, said in a conference call with journalists that they were ignored, mocked or terminated for reporting the behavior. The accusations included claims that co-workers or supervisors sexually propositioned, groped or exposed themselves to the women.

“I felt I had no choice but to tolerate it,” Kimberley Lawson, 25, who makes $8.75 per hour at a McDonald’s in Kansas City, Missouri, said on a conference call with reporters.

The restaurant industry, which employs half of American women at some point in their lives, has one of the country’s largest sexual harassment problems because its low-wage and largely female workforce is vulnerable to mistreatment from customers and colleagues.

The complaints against McDonald's Corp MCD.N and the franchisee operators of the restaurants where the women work are similar to sexual harassment accusations also filed with the EEOC two years ago and land ahead of the company's annual meeting on Thursday.

McDonald’s spokeswoman Terri Hickey said the company was dismissed from the 2016 claims because they did not employ the individuals who filed the complaints.

Hickey said that McDonald’s has policies that prohibit sexual harassment at the company and at the restaurants it owns and operates, while franchisees are responsible for setting employment policies for their restaurants.

The TIME’S UP Legal Defense Fund, established earlier this year by the National Women’s Law Center, is covering legal fees for the women.

The company said in a statement that it takes the accusations seriously and that the franchisees who operate some 90 percent its roughly 14,000 U.S. restaurants “will do the same.”

Fight for $15 and TIME’S UP are pressing the world’s largest restaurant chain to establish and train employees on a zero-tolerance sexual harassment policy and to create a safe and effective process for receiving and responding to complaints.

If an EEOC review of the cases finds they have merit, the agency would call on the company to engage in informal settlement talks. If that failed, EEOC could sue the company or issue the workers “right to sue” letters.

The U.S. Supreme Court on Monday upheld employers’ ability to block workers who signed arbitration agreements from filing class-action lawsuits. Sexual harassment cases are usually not class actions because of the unique facts in each case. If the workers signed arbitration agreements, that could keep individual claims out of court.

Attorneys told reporters on the conference call that they were investigating whether the women had signed arbitration agreements. They said workers in prior cases had not.

The women could find it difficult to hold McDonald’s responsible for the actions of its franchisees.

In two earlier labor law cases, federal judges in California have said that McDonald’s does not exercise enough control over franchise workers to be considered a joint employer.

Also, McDonald’s in April proposed settling a National Labor Relations Board case that allows it to avoid a joint employer ruling without paying any money to franchise workers who claimed they were fired, suspended or had their hours cut for participating in Fight for $15 protests calling for higher wages.